Bài 32: Tìm hiểu về lớp File trong Java

[cangbecangto]

/* bài viết thuộc loạt bài hướng dẫn trong "khóa học lập trình java miễn phí"
trên diễn đàn android.vn, bạn có thể vào đây đọc
để hiểu hơn về khóa học và tham gia ngay cùng mọi người */



android.vn/attachments/untitled-png.22672/" border="0" alt="" />


​

- lớp file thường được dùng để lấy các thông tin về tập tin cũng như thư mục.​- hình ảnh ở trên chắc chắn các bạn thấy rất quen thuộc, đó là quá trình 1 phần mềm duyệt thư mục và chờ người dùng tìm, chọn mở 1 file hoặc thư mục nào đó.
- kiến thức ở mục này sẽ giúp các bạn hiểu bản chất các câu lệnh có thể làm được điều này, tuy nhiên nếu bạn chưa biết về lập trình giao diện trong java thì chưa thể làm được, ở loạt bài viết về lập trình giao diện trong java mình sẽ nhắc lại và cùng mọi người làm 1 chương trình
có thể duyệt được file, thư mục tương tự như hình ảnh trên!

**chúng ta bắt đầu vào tìm hiểu về lớp file:

1, tạo đối tượng file từ đường dẫn tuyệt đối
public file(string pathname)
ví dụ:

[color=#000000]
[/color][color=#ff8000]//tạo trước thư mục "demo" trong ổ e, nếu không chương trình sẽ lỗi[/color][color=#0000bb]file f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#dd0000]"e:\\demo\\androidvn.txt"[/color][color=#007700]);[/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]createnewfile[/color][color=#007700]();[/color] 

2, tạo đối tượng file từ tên đường dẫn thu mục và tên tập tin trong thư mục đó

[color=#000000]
[/color][color=#ff8000]//tạo trước thư mục "demo" trong ổ e, nếu không chương trình sẽ lỗi[/color][color=#0000bb]file f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#dd0000]"e:\\demo"[/color][color=#007700],[/color][color=#dd0000]"androidvn2.txt"[/color][color=#007700]);[/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]createnewfile[/color][color=#007700]();[/color] 

3, tạo đối tượng file từ một đối tượng file khác
public file(file parent, string child)
ví dụ:

[color=#000000]
file dir [/color][color=#007700]= new [/color][color=#0000bb]file [/color][color=#007700]([/color][color=#dd0000]"e:\\demo"[/color][color=#007700]);[/color][color=#0000bb]file f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]dir[/color][color=#007700],[/color][color=#dd0000]"androidvn3.txt"[/color][color=#007700]);[/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]createnewfile[/color][color=#007700]();[/color] 

4, tạo 1 thư mục với đường dẫn
ví dụ:

[color=#000000]
file f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#dd0000]"e:\\demo2"[/color][color=#007700]);[/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]mkdir[/color][color=#007700]();[/color] 

5, một số phương thức thường gặp của lớp file

​

6, lấy danh sách tên các tập tin và thư mục con của đối tượng:
ta sử dụng:
- public string[] list()
file đang xét và trả về trong một mảng.
ví dụ:

[color=#000000]
package javaandroidvn[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]file[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]ioexception[/color][color=#007700]; public class [/color][color=#0000bb]javaandroidvn [/color][color=#007700]{     public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) [/color][color=#0000bb]throws ioexception [/color][color=#007700]{        [/color][color=#ff8000]//tạo trước thư mục "demo" trong ổ e, tạo 1 vài file và thư mục trong đó        [/color][color=#0000bb]file dir [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#dd0000]"e:\\demo"[/color][color=#007700]);        [/color][color=#0000bb]file[/color][color=#007700][] [/color][color=#0000bb]listfile [/color][color=#007700]= [/color][color=#0000bb]dir[/color][color=#007700].[/color][color=#0000bb]listfiles[/color][color=#007700]();         [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"danh sách file trong thư mục e:\\demo là: "[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]listfile[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            if ([/color][color=#0000bb]listfile[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]isfile[/color][color=#007700]()) {                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]listfile[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]getname[/color][color=#007700]());            }        }        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"danh sách thưc mục trong thư mục e:\\demo là: "[/color][color=#007700]);        for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]listfile[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {            if ([/color][color=#0000bb]listfile[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]isdirectory[/color][color=#007700]()) {                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]listfile[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]getname[/color][color=#007700]());            }        }    }}[/color] 

tham khảo thêm 3 video của anh việt bên blog studyandshare








​

bài tập về nhà::d
(lần này mình giao bài khó khó chút nhé)
tạo 1 chương trình gần giống cmd trong ms-dos chạy trên màn hình console, chức năng như sau:
- bật chương trình lên mặc định vào ổ e (hoặc ổ nào tùy ý), hiện lên e:\\ (tên đường đang hiện hành)
- gõ "cd tenthumuc" thì màn hình chuyển và hiện lên e:\\tenthumuc trong đó tenthumuc là tên thư mục tiếp tục muốn truy xuất.
- gõ "makefile tenfile" thì sẽ tạo file trong thư mục hiện hành, trong đó tenfile là tên file cần tạo.
- từ vị trí con trỏ hiện hành, gõ "show" thì hiển thị ra toàn bộ cấu trúc cây thư mục trong thư mục đó.
....
trình bày khá dài dòng nhỉ, các bạn cứ cố gắng làm càng giống cmd trong ms-dos càng hay, bạn nào làm xong nhớ share mọi người cùng tham khảo nhé :d

(chú ý: các bạn nên tự giác làm bài tập, hoàn thiện rồi đăng lên, các bài bạn đã làm, nên để code trong thẻ code - chọn thẻ php cho rõ ràng và để ẩn code trong thẻ ẩn spoiler, để khi click vào mới hiện code lên , trước khi thử sức tự làm, bạn không nên nhìn code của các bạn khác đã đăng nhé)

​

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bài viết đăng lên diễn đàn khác vui lòng ghi rõ nguồn: android.vn​

[quaoccho42016]

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[color=#000000]
[/color][color=#ff8000]/** to change this template, choose tools | templates* and open the template in the editor.*/[/color][color=#0000bb]package javabasic[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]bufferedreader[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]file[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]filereader[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]inputstreamreader[/color][color=#007700]; [/color][color=#ff8000]/**** @author ha*/[/color][color=#007700]public class [/color][color=#0000bb]cmd [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]){        try {            [/color][color=#0000bb]string s[/color][color=#007700];            [/color][color=#0000bb]bufferedreader bf [/color][color=#007700]= new [/color][color=#0000bb]bufferedreader[/color][color=#007700](new [/color][color=#0000bb]inputstreamreader[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]));            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"bạn đang ở trình điều khiển cmd ổ đĩa e! 
nếu bạn muốn thoát, hãy nhập stop!"[/color][color=#007700]);            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"bạn đang ở e:\\"[/color][color=#007700]);            [/color][color=#0000bb]string pathname [/color][color=#007700]= [/color][color=#dd0000]"e:"[/color][color=#007700];            [/color][color=#0000bb]string temp[/color][color=#007700];            do {                [/color][color=#0000bb]s [/color][color=#007700]= [/color][color=#0000bb]bf[/color][color=#007700].[/color][color=#0000bb]readline[/color][color=#007700]();                               if ([/color][color=#0000bb]s[/color][color=#007700].[/color][color=#0000bb]startswith[/color][color=#007700]([/color][color=#dd0000]"cd"[/color][color=#007700])){                     [/color][color=#0000bb]temp [/color][color=#007700]= [/color][color=#0000bb]s[/color][color=#007700].[/color][color=#0000bb]trim[/color][color=#007700]().[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700]);                    [/color][color=#0000bb]move[/color][color=#007700]([/color][color=#0000bb]pathname[/color][color=#007700],[/color][color=#0000bb]temp[/color][color=#007700]);                    [/color][color=#0000bb]pathname [/color][color=#007700]= [/color][color=#0000bb]pathname [/color][color=#007700]+ [/color][color=#dd0000]"\\" [/color][color=#007700]+ [/color][color=#0000bb]temp[/color][color=#007700];                } else if ([/color][color=#0000bb]s[/color][color=#007700].[/color][color=#0000bb]startswith[/color][color=#007700]([/color][color=#dd0000]"makefile"[/color][color=#007700])){                    [/color][color=#0000bb]temp [/color][color=#007700]= [/color][color=#0000bb]s[/color][color=#007700].[/color][color=#0000bb]trim[/color][color=#007700]().[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]9[/color][color=#007700]);                    [/color][color=#0000bb]createfile[/color][color=#007700]([/color][color=#0000bb]pathname[/color][color=#007700], [/color][color=#0000bb]temp[/color][color=#007700]);                } else if ([/color][color=#0000bb]s[/color][color=#007700].[/color][color=#0000bb]startswith[/color][color=#007700]([/color][color=#dd0000]"show"[/color][color=#007700])){                    [/color][color=#0000bb]show[/color][color=#007700]([/color][color=#0000bb]pathname[/color][color=#007700]);                }                           } while (![/color][color=#0000bb]s[/color][color=#007700].[/color][color=#0000bb]equalsignorecase[/color][color=#007700]([/color][color=#dd0000]"stop"[/color][color=#007700]));        } catch ([/color][color=#0000bb]exception ex[/color][color=#007700]){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"có lỗi xảy ra: " [/color][color=#007700]+ [/color][color=#0000bb]ex[/color][color=#007700]);        }    }    public static [/color][color=#0000bb]void createfile[/color][color=#007700]([/color][color=#0000bb]string pathname[/color][color=#007700], [/color][color=#0000bb]string filename[/color][color=#007700]){        try {            [/color][color=#0000bb]file file [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]pathname[/color][color=#007700], [/color][color=#0000bb]filename[/color][color=#007700]);            [/color][color=#0000bb]file[/color][color=#007700].[/color][color=#0000bb]createnewfile[/color][color=#007700]();            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"thông báo: file " [/color][color=#007700]+ [/color][color=#0000bb]file[/color][color=#007700].[/color][color=#0000bb]getname[/color][color=#007700]() + [/color][color=#dd0000]" đã được tạo thành công!"[/color][color=#007700]);                   } catch ([/color][color=#0000bb]exception ex[/color][color=#007700]){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"đã xảy ra lỗi khi tạo!"[/color][color=#007700]);                 }         }    public static [/color][color=#0000bb]void move[/color][color=#007700]([/color][color=#0000bb]string pathname[/color][color=#007700], [/color][color=#0000bb]string dirname[/color][color=#007700]){        try {               [/color][color=#0000bb]string s [/color][color=#007700]= [/color][color=#dd0000]""[/color][color=#007700];            [/color][color=#0000bb]pathname [/color][color=#007700]= [/color][color=#0000bb]pathname [/color][color=#007700]+ [/color][color=#dd0000]"\\" [/color][color=#007700]+ [/color][color=#0000bb]dirname[/color][color=#007700];            [/color][color=#0000bb]file file [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]pathname[/color][color=#007700]);            if([/color][color=#0000bb]file[/color][color=#007700].[/color][color=#0000bb]isfile[/color][color=#007700]()){          [/color][color=#ff8000]// thuc hien mo file                [/color][color=#0000bb]bufferedreader br[/color][color=#007700]= new [/color][color=#0000bb]bufferedreader[/color][color=#007700](new [/color][color=#0000bb]filereader[/color][color=#007700]([/color][color=#0000bb]file[/color][color=#007700]));                while (([/color][color=#0000bb]s [/color][color=#007700]= [/color][color=#0000bb]br[/color][color=#007700].[/color][color=#0000bb]readline[/color][color=#007700]()) != [/color][color=#0000bb]null[/color][color=#007700]){                    [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]s[/color][color=#007700]);                }            }                   } catch ([/color][color=#0000bb]exception ex[/color][color=#007700]){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]dirname [/color][color=#007700]+ [/color][color=#dd0000]" không tồn tại!"[/color][color=#007700]);                   } finally {            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"bạn đang ở: " [/color][color=#007700]+ [/color][color=#0000bb]pathname[/color][color=#007700]);        }           }       public static [/color][color=#0000bb]void show[/color][color=#007700]([/color][color=#0000bb]string pathname[/color][color=#007700]){        try {            [/color][color=#0000bb]file dir [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]pathname[/color][color=#007700]);            if ([/color][color=#0000bb]dir[/color][color=#007700].[/color][color=#0000bb]isfile[/color][color=#007700]()){                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]dir[/color][color=#007700].[/color][color=#0000bb]getname[/color][color=#007700]() + [/color][color=#dd0000]" không phải là thư mục!"[/color][color=#007700]);            } else if ([/color][color=#0000bb]dir[/color][color=#007700].[/color][color=#0000bb]isdirectory[/color][color=#007700]()){                [/color][color=#0000bb]file[/color][color=#007700][] [/color][color=#0000bb]listfile [/color][color=#007700]= [/color][color=#0000bb]dir[/color][color=#007700].[/color][color=#0000bb]listfiles[/color][color=#007700]();                for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]listfile[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++){                    [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"  " [/color][color=#007700]+ [/color][color=#0000bb]i [/color][color=#007700]+ [/color][color=#dd0000]", " [/color][color=#007700]+ [/color][color=#0000bb]listfile[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]getname[/color][color=#007700]());                }            }        } catch ([/color][color=#0000bb]exception ex[/color][color=#007700]){            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"lỗi khi show file! " [/color][color=#007700]+ [/color][color=#0000bb]ex[/color][color=#007700]);        }           }}[/color] 

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[nguyenngoctugamuda]

cảm ơn rất nhiều !

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import java.io.file;
import java.io.filenotfoundexception;
import java.io.ioexception;
import java.util.scanner;
 
public class btbai32 {
    public static void main(string[]args) throws ioexception{
        scanner in=new scanner(system.in);
        string d="d:\\\\";
        system.out.println(d);
        string s=in.nextline();
        string s1,s2,s3;
        switch(s)
        {
            case  "cd":
            {
                try{
                    system.out.println("nhap ten thu muc");
                    s1=in.nextline();
                    taodirectory(d,s1);
                    system.out.println("nhap file or show thu muc ?");
                    s3=in.nextline();
                    switch(s3)
                    {
                        case "makefile":
                        {
                            system.out.println("nhap ten file");
                            s2=in.nextline();
                            taofile(s1,s2);
                            break;
                        }
                        case "show":
                        {
                            showdirectory(d+s1);
                            break;
                        }
                        default:
                            system.out.println("cd success");
                    }
                   
                }catch(exception exc){
                    system.out.println("error cd directory");
                }
                break;
            }
            case "makefile":
            {
                try{
                    system.out.println("nhap ten thu muc:");
                    s1=in.nextline();
                    system.out.println("nhap ten file");
                    s2=in.nextline();
                    taofile(s1,s2);
                }catch(ioexception exc){
                    system.out.println("error make file");
                }
                break;
            }
            case "show":
            {
                try{
                    system.out.println("show thu muc");
                    system.out.println("ten thu muc:");
                    s1=in.nextline();
                    showdirectory(s1);
                }catch(exception exc){
                    system.out.println("error show file");
                }
                break;
            }
            default:
                system.out.println("try again");
        }
    }
    public static void taodirectory(string d,string s)
    {
        system.out.println(d+s);
    }
    public static void taofile(string s1,string s2) throws ioexception
    {
        string d1="d:\\\\"+""+s1+"\\"+s2;
           
        file f = new file(d1);
        f.createnewfile();
        system.out.println(d1);
    }
    public static void showdirectory(string s)
    {
        //tạo trước thư mục "demo" trong ổ d, tạo 1 vài file và thư mục trong đó
        file dir = new file(s);
        file[] listfile = dir.listfiles();
 
        system.out.println("danh sách file trong thư mục "+s+" là: ");
        for (int i = 0; i < listfile.length; i++) {
            if (listfile[i].isfile()) {
                system.out.println(listfile[i].getname());
            }
        }
        system.out.println("danh sách thưc mục trong thư mục "+s+" là: ");
        for (int i = 0; i < listfile.length; i++) {
            if (listfile[i].isdirectory()) {
                system.out.println(listfile[i].getname());
            }
        }
 
    }
}

</blockquote></div>
</div>
</div>

[vapersy1]

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[color=#000000]
    [/color][color=#007700]public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string [/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) [/color][color=#0000bb]throws ioexception[/color][color=#007700]{        [/color][color=#0000bb]file f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#dd0000]"d:\\"[/color][color=#007700]);        [/color][color=#0000bb]string command[/color][color=#007700];        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]getpath[/color][color=#007700]() + [/color][color=#dd0000]"\\"[/color][color=#007700]);             do {          [/color][color=#0000bb]bufferedreader br [/color][color=#007700]= new [/color][color=#0000bb]bufferedreader[/color][color=#007700](new [/color][color=#0000bb]inputstreamreader[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]));        [/color][color=#0000bb]string temp[/color][color=#007700][] = [/color][color=#0000bb]br[/color][color=#007700].[/color][color=#0000bb]readline[/color][color=#007700]().[/color][color=#0000bb]split[/color][color=#007700]([/color][color=#dd0000]" "[/color][color=#007700]);        [/color][color=#0000bb]command [/color][color=#007700]= [/color][color=#0000bb]temp[/color][color=#007700][[/color][color=#0000bb]0[/color][color=#007700]];        switch ( [/color][color=#0000bb]temp[/color][color=#007700][[/color][color=#0000bb]0[/color][color=#007700]]) {            case [/color][color=#dd0000]"cd"[/color][color=#007700]:                [/color][color=#0000bb]f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]f[/color][color=#007700], [/color][color=#0000bb]temp[/color][color=#007700][[/color][color=#0000bb]1[/color][color=#007700]]);                if ( ![/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]isdirectory[/color][color=#007700]()) {                                             [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]temp[/color][color=#007700][[/color][color=#0000bb]1[/color][color=#007700]] + [/color][color=#dd0000]" is not a directory!"[/color][color=#007700]);                [/color][color=#0000bb]f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]getparent[/color][color=#007700]());                }                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]getpath[/color][color=#007700]() + [/color][color=#dd0000]"\\"[/color][color=#007700]);                                   break;            case [/color][color=#dd0000]"makefile"[/color][color=#007700]:                [/color][color=#0000bb]f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]f[/color][color=#007700],[/color][color=#0000bb]temp[/color][color=#007700][[/color][color=#0000bb]1[/color][color=#007700]]);                [/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]createnewfile[/color][color=#007700]();                [/color][color=#0000bb]f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]getparent[/color][color=#007700]());                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]getpath[/color][color=#007700]() + [/color][color=#dd0000]"\\"[/color][color=#007700]);                break;            case [/color][color=#dd0000]"show"[/color][color=#007700]:                [/color][color=#0000bb]file[/color][color=#007700][] [/color][color=#0000bb]f2 [/color][color=#007700]= [/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]listfiles[/color][color=#007700]();                for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]f2[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {                    [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]f2[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]getname[/color][color=#007700]());                }                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]getpath[/color][color=#007700]() + [/color][color=#dd0000]"\\"[/color][color=#007700]);                break;            case [/color][color=#dd0000]"exit"[/color][color=#007700]:                break;            default: [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"command not valid!"[/color][color=#007700]);        }      } while ( [/color][color=#0000bb]command[/color][color=#007700].[/color][color=#0000bb]compareto[/color][color=#007700]([/color][color=#dd0000]"exit"[/color][color=#007700]) != [/color][color=#0000bb]0[/color][color=#007700]);    }[/color] 

</blockquote></div>
</div>
</div>

[timlai2211]

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[color=#000000]
package nhansu[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]ioexception[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]bufferedreader[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]inputstreamreader[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]file[/color][color=#007700];public class [/color][color=#0000bb]cmd [/color][color=#007700]{    public [/color][color=#0000bb]void thumuc[/color][color=#007700]()[/color][color=#0000bb]throws ioexception[/color][color=#007700]{        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"microsoft windows [version 6.1.7601]"[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"copyright (c) 2009 microsoft corporation. all right reserved."[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"c:\users\administrator>"[/color][color=#007700]);        [/color][color=#0000bb]int k[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];        while([/color][color=#0000bb]k[/color][color=#007700]==[/color][color=#0000bb]0[/color][color=#007700]){            [/color][color=#0000bb]bufferedreader br[/color][color=#007700]=new [/color][color=#0000bb]bufferedreader[/color][color=#007700](new [/color][color=#0000bb]inputstreamreader[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]));            [/color][color=#0000bb]string st[/color][color=#007700]=[/color][color=#0000bb]br[/color][color=#007700].[/color][color=#0000bb]readline[/color][color=#007700]();            [/color][color=#0000bb]string st4[/color][color=#007700]=[/color][color=#0000bb]st[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]0[/color][color=#007700],[/color][color=#0000bb]8[/color][color=#007700]);            if([/color][color=#0000bb]st4[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#dd0000]"makefile"[/color][color=#007700])){                [/color][color=#0000bb]string st5[/color][color=#007700]=[/color][color=#0000bb]st[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]9[/color][color=#007700]);                [/color][color=#0000bb]k[/color][color=#007700]=[/color][color=#0000bb]1[/color][color=#007700];                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"thu muc luu file:"[/color][color=#007700]);                [/color][color=#0000bb]string st6[/color][color=#007700]=[/color][color=#0000bb]br[/color][color=#007700].[/color][color=#0000bb]readline[/color][color=#007700]();                [/color][color=#0000bb]st5[/color][color=#007700]=[/color][color=#0000bb]st6[/color][color=#007700]+[/color][color=#dd0000]"\\"[/color][color=#007700]+[/color][color=#dd0000]"\\"[/color][color=#007700]+[/color][color=#0000bb]st5[/color][color=#007700];                [/color][color=#0000bb]file f[/color][color=#007700]=new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]st5[/color][color=#007700]);                [/color][color=#0000bb]f[/color][color=#007700].[/color][color=#0000bb]createnewfile[/color][color=#007700]();                [/color][color=#0000bb]string st7[/color][color=#007700]=[/color][color=#0000bb]br[/color][color=#007700].[/color][color=#0000bb]readline[/color][color=#007700]();                if([/color][color=#0000bb]st7[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#dd0000]"show"[/color][color=#007700])){                    [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"thu muc:"[/color][color=#007700]);                    [/color][color=#0000bb]string st8[/color][color=#007700]=[/color][color=#0000bb]br[/color][color=#007700].[/color][color=#0000bb]readline[/color][color=#007700]();                    [/color][color=#0000bb]file f2[/color][color=#007700]=new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]st8[/color][color=#007700]);                    [/color][color=#0000bb]file [/color][color=#007700][][/color][color=#0000bb]mang[/color][color=#007700]=[/color][color=#0000bb]f2[/color][color=#007700].[/color][color=#0000bb]listfiles[/color][color=#007700]();                    for([/color][color=#0000bb]int i[/color][color=#007700]=[/color][color=#0000bb]0[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]<[/color][color=#0000bb]mang[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700];[/color][color=#0000bb]i[/color][color=#007700]++)                        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]mang[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]getname[/color][color=#007700]());                }                break;            }            [/color][color=#0000bb]string st2[/color][color=#007700]=[/color][color=#0000bb]st[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700]);            [/color][color=#0000bb]string st3[/color][color=#007700]=[/color][color=#0000bb]st2[/color][color=#007700]+[/color][color=#dd0000]">"[/color][color=#007700];            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]st3[/color][color=#007700]);        }    }    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][][/color][color=#0000bb]args[/color][color=#007700])[/color][color=#0000bb]throws ioexception[/color][color=#007700]{        [/color][color=#0000bb]cmd a[/color][color=#007700]=new [/color][color=#0000bb]cmd[/color][color=#007700]();        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]thumuc[/color][color=#007700]();    }}[/color] 

</blockquote></div>
</div>
</div>

[BanHangOL]

code hơi dài, nhưng khắc phục được khi gõ trống không cd, cd[space] và trả về e:\\ ​

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[color=#000000]
package javabasic[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].*; [/color][color=#ff8000]/**** @author zhenyuan0502*/[/color][color=#007700]public class [/color][color=#0000bb]thuchanh_file [/color][color=#007700]{     public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) [/color][color=#0000bb]throws ioexception [/color][color=#007700]{        [/color][color=#0000bb]string locate[/color][color=#007700], [/color][color=#0000bb]locate_c[/color][color=#007700], [/color][color=#0000bb]locate_c_c[/color][color=#007700];        [/color][color=#0000bb]int i[/color][color=#007700];        [/color][color=#0000bb]int k [/color][color=#007700]= [/color][color=#0000bb]1[/color][color=#007700];        [/color][color=#0000bb]scanner input [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"press [ stop ] to stop process"[/color][color=#007700]);        [/color][color=#0000bb]label[/color][color=#007700]:        do {            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"e:\\\\"[/color][color=#007700]);            [/color][color=#0000bb]locate [/color][color=#007700]= [/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();            if ([/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]compareto[/color][color=#007700]([/color][color=#dd0000]"stop"[/color][color=#007700]) == [/color][color=#0000bb]0[/color][color=#007700]) {                break;            }            if ([/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700]() < [/color][color=#0000bb]4[/color][color=#007700]) {            } else {                if (([/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]0[/color][color=#007700], [/color][color=#0000bb]3[/color][color=#007700]).[/color][color=#0000bb]compareto[/color][color=#007700]([/color][color=#dd0000]"cd "[/color][color=#007700]) == [/color][color=#0000bb]0[/color][color=#007700]) && ([/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700]) != [/color][color=#0000bb]null[/color][color=#007700]) ) {                    try {                        [/color][color=#0000bb]file f [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700])); [/color][color=#ff8000]//4                                           [/color][color=#0000bb]file dir [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#dd0000]"e:\\\\"[/color][color=#007700]);                        [/color][color=#0000bb]file[/color][color=#007700][] [/color][color=#0000bb]listf [/color][color=#007700]= [/color][color=#0000bb]dir[/color][color=#007700].[/color][color=#0000bb]listfiles[/color][color=#007700]();                        for ([/color][color=#0000bb]i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]listf[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {                            if ((([/color][color=#0000bb]listf[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]getname[/color][color=#007700]()).[/color][color=#0000bb]compareto[/color][color=#007700]([/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700])) == [/color][color=#0000bb]0[/color][color=#007700]) && [/color][color=#0000bb]listf[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]isdirectory[/color][color=#007700]()) {                                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"e:\\\\" [/color][color=#007700]+ [/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700]) + [/color][color=#dd0000]"\\"[/color][color=#007700]);                                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"you want to create a file? press [ makefile file_name ] to create or [ stop ] to stop process"[/color][color=#007700]);                                [/color][color=#0000bb]locate_c [/color][color=#007700]= [/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();                                if ([/color][color=#0000bb]locate_c[/color][color=#007700].[/color][color=#0000bb]compareto[/color][color=#007700]([/color][color=#dd0000]"stop"[/color][color=#007700]) == [/color][color=#0000bb]0[/color][color=#007700]) {                                    [/color][color=#0000bb]k [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700];                                    return;                                }                                if (([/color][color=#0000bb]locate_c[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]0[/color][color=#007700], [/color][color=#0000bb]9[/color][color=#007700]).[/color][color=#0000bb]compareto[/color][color=#007700]([/color][color=#dd0000]"makefile "[/color][color=#007700]) == [/color][color=#0000bb]0[/color][color=#007700]) && ([/color][color=#0000bb]locate_c[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]9[/color][color=#007700]) != [/color][color=#0000bb]null[/color][color=#007700])) {                                    try {                                        [/color][color=#0000bb]file fc [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#dd0000]"e:\\\\" [/color][color=#007700]+ [/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700]) + [/color][color=#dd0000]"\\" [/color][color=#007700]+ [/color][color=#0000bb]locate_c[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]9[/color][color=#007700]) + [/color][color=#dd0000]"\\"[/color][color=#007700]);                                        [/color][color=#0000bb]fc[/color][color=#007700].[/color][color=#0000bb]createnewfile[/color][color=#007700]();                                        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"create file success"[/color][color=#007700]);                                        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"you want to show subfolder in this folder? [show/stop] "[/color][color=#007700]);                                        [/color][color=#0000bb]locate_c_c [/color][color=#007700]= [/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();                                        if ([/color][color=#0000bb]locate_c_c[/color][color=#007700].[/color][color=#0000bb]compareto[/color][color=#007700]([/color][color=#dd0000]"stop"[/color][color=#007700]) == [/color][color=#0000bb]0[/color][color=#007700]) {                                            [/color][color=#0000bb]k [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700];                                            return;                                        }                                        if ([/color][color=#0000bb]locate_c_c[/color][color=#007700].[/color][color=#0000bb]compareto[/color][color=#007700]([/color][color=#dd0000]"show"[/color][color=#007700]) == [/color][color=#0000bb]0[/color][color=#007700]) {                                            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"e:\\\\" [/color][color=#007700]+ [/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700]) + [/color][color=#dd0000]"\\"[/color][color=#007700]);                                            [/color][color=#0000bb]file dir_c [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#dd0000]"e:\\\\" [/color][color=#007700]+ [/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700]) + [/color][color=#dd0000]"\\"[/color][color=#007700]);                                            [/color][color=#0000bb]file[/color][color=#007700][] [/color][color=#0000bb]listf_c [/color][color=#007700]= [/color][color=#0000bb]dir_c[/color][color=#007700].[/color][color=#0000bb]listfiles[/color][color=#007700]();                                            for ([/color][color=#0000bb]i [/color][color=#007700]= [/color][color=#0000bb]1[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]listf_c[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {                                                if ([/color][color=#0000bb]listf_c[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]isdirectory[/color][color=#007700]()) {                                                    [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"e:\\\\" [/color][color=#007700]+ [/color][color=#0000bb]locate[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700]) + [/color][color=#dd0000]"\\" [/color][color=#007700]+ [/color][color=#0000bb]listf_c[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]].[/color][color=#0000bb]getname[/color][color=#007700]());                                                }                                            }                                            [/color][color=#0000bb]k [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700];                                            return;                                        }                                        [/color][color=#0000bb]k [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700];                                        return;                                    } catch ([/color][color=#0000bb]ioexception e[/color][color=#007700]) {                                        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"error: " [/color][color=#007700]+ [/color][color=#0000bb]e[/color][color=#007700]);                                    }                                }                                [/color][color=#0000bb]k [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700];                                return;                            }                        }                        if ([/color][color=#0000bb]k [/color][color=#007700]!= [/color][color=#0000bb]0[/color][color=#007700]) {                                                   continue [/color][color=#0000bb]label[/color][color=#007700];                        }                    } catch ([/color][color=#0000bb]exception e[/color][color=#007700]) {                        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"folder not found"[/color][color=#007700]);                        throw [/color][color=#0000bb]e[/color][color=#007700];                    }                               }            }        } while ([/color][color=#0000bb]true[/color][color=#007700]);    }}[/color] 

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[color=#000000]
package java_java[/color][color=#007700]; [/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]file[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]io[/color][color=#007700].[/color][color=#0000bb]ioexception[/color][color=#007700];[/color][color=#0000bb]import java[/color][color=#007700].[/color][color=#0000bb]util[/color][color=#007700].[/color][color=#0000bb]scanner[/color][color=#007700]; public class [/color][color=#0000bb]cmd [/color][color=#007700]{    public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]args[/color][color=#007700]) [/color][color=#0000bb]throws ioexception [/color][color=#007700]{        [/color][color=#0000bb]scanner input [/color][color=#007700]= new [/color][color=#0000bb]scanner[/color][color=#007700]([/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]in[/color][color=#007700]);        [/color][color=#0000bb]string option [/color][color=#007700]= new [/color][color=#0000bb]string[/color][color=#007700]();         [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"d:\\\\"[/color][color=#007700]);         [/color][color=#0000bb]option [/color][color=#007700]= [/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        if ([/color][color=#0000bb]option[/color][color=#007700].[/color][color=#0000bb]startswith[/color][color=#007700]([/color][color=#dd0000]"cd"[/color][color=#007700])) {            [/color][color=#0000bb]option [/color][color=#007700]= [/color][color=#dd0000]"d:\\\\" [/color][color=#007700]+ [/color][color=#0000bb]option[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]3[/color][color=#007700]);            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#0000bb]option[/color][color=#007700]);        }         if ([/color][color=#0000bb]option[/color][color=#007700].[/color][color=#0000bb]startswith[/color][color=#007700]([/color][color=#dd0000]"makefile"[/color][color=#007700])) {            [/color][color=#0000bb]string tenfile[/color][color=#007700];            [/color][color=#ff8000]// string d;            // system.out.print("d:\\\\");            [/color][color=#0000bb]tenfile [/color][color=#007700]= [/color][color=#0000bb]option[/color][color=#007700].[/color][color=#0000bb]substring[/color][color=#007700]([/color][color=#0000bb]9[/color][color=#007700]);             [/color][color=#0000bb]tenfile [/color][color=#007700]= [/color][color=#dd0000]"d:\\\\" [/color][color=#007700]+ [/color][color=#0000bb]tenfile[/color][color=#007700];            [/color][color=#0000bb]file dir [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#0000bb]tenfile[/color][color=#007700]);            [/color][color=#0000bb]dir[/color][color=#007700].[/color][color=#0000bb]createnewfile[/color][color=#007700]();        }         if ([/color][color=#0000bb]option[/color][color=#007700].[/color][color=#0000bb]compareto[/color][color=#007700]([/color][color=#dd0000]"show"[/color][color=#007700]) == [/color][color=#0000bb]0[/color][color=#007700]) {            [/color][color=#0000bb]file dir [/color][color=#007700]= new [/color][color=#0000bb]file[/color][color=#007700]([/color][color=#dd0000]"d:\\"[/color][color=#007700]);            [/color][color=#0000bb]file[/color][color=#007700][] [/color][color=#0000bb]listfile [/color][color=#007700]= [/color][color=#0000bb]dir[/color][color=#007700].[/color][color=#0000bb]listfiles[/color][color=#007700]();             [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"thu muc:"[/color][color=#007700]);             for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]listfile[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {                if ([/color][color=#0000bb]listfile[/color][color=#007700].[/color][color=#0000bb]isdirectory[/color][color=#007700]()) {                    [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]listfile[/color][color=#007700].[/color][color=#0000bb]getname[/color][color=#007700]());                }            }             [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"file:"[/color][color=#007700]);             for ([/color][color=#0000bb]int i [/color][color=#007700]= [/color][color=#0000bb]0[/color][color=#007700]; [/color][color=#0000bb]i [/color][color=#007700]< [/color][color=#0000bb]listfile[/color][color=#007700].[/color][color=#0000bb]length[/color][color=#007700]; [/color][color=#0000bb]i[/color][color=#007700]++) {                if ([/color][color=#0000bb]listfile[/color][color=#007700].[/color][color=#0000bb]isabsolute[/color][color=#007700]()) {                    [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#0000bb]listfile[/color][color=#007700].[/color][color=#0000bb]getname[/color][color=#007700]());                }            }        }         [/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]close[/color][color=#007700]();    } }[/color] 

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<div class="attribution type"><noscript>[php (move your mouse to reveal the content)</noscript>

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<div class="quotecontent">
<div class="bbcm_spoiler_noscript"><blockquote>package baitap;
import java.io.*;
import java.util.scanner;
public class unit32 {
public void taothumuc(string folder){
try {
file dir = new file(folder);
dir.mkdir();
} catch (exception e) {
system.out.println("k the tao thu muc");
}
}
public static void main(string[] args) throws ioexception {
scanner in=new scanner(system.in);
unit32 un= new unit32();
string a,a1,b1,b,show;
system.out.print("d:\\");
a=in.nextline();
a1="d:\\"+a.substring(3,a.length());
un.taothumuc(a1);
system.out.println(a1);
b=in.nextline();
b1=b.substring(9,b.length());
file f= new file(a1,b1);
f.createnewfile();
show=in.nextline();
if(show.equalsignorecase("show")==true){
system.out.println(f.getpath());
}
}
} [/php]]</blockquote></div>
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