Bài 15: Phương thức setter và getter trong Java

**dangtin180** · 11-07-2013, 07:00 AM

Mã:

package baitap;
 
//tạo package nhân sự, trong có 2 class là sinh viên và giảng viên
//class sinh viên gồm các thuộc tính: họ tên, lớp học, điểm toán, lý, hóa.
//class giảng viên gồm các thuộc tính: họ tên, lớp dạy, năm sinh, lương.
//tạo đối tượng học sinh a.
//tạo đối tượng giảng viên b.
//các giá trị của thuộc tính a và b nhập vào từ bàn phím.
//xử lý dữ liệu báo ra thông tin của a và b, tính và báo ra điểm trung bình của a,
//xếp loại học lực, báo b có dạy a hay không!
//các thuộc tính để private, sử dụng phương thức getter, setter.
//lập trình hướng đối tượng!
 
class sinhvien{
    private string hotensv;
    private string lophoc;
    private float diemtoan, diemly,diemhoa;
   
    // dat va lay ho ten
    public void sethotensv(string ht){
        this.hotensv=ht;
    }
    public string gethotensv(){
        return hotensv;
    }
   
    // dat va lay lop
    public void setlophoc(string l){
        this.lophoc=l;
    }
    public string getlophoc(){
        return lophoc;
    }
   
    //dat va lay diem toan
    public void setdiemtoan(float dt){
        this.diemtoan=dt;
    }
    public float getdiemtoan(){
        return diemtoan;
    }
   
    //dat va lay diem ly
    public void setdiemly(float dl){
        this.diemly=dl;
    }
    public float getdiemly(){
        return diemly;
    }
   
    //dat va lay diem hoa
    public void setdiemhoa(float dh){
        this.diemhoa=dh;
    }
    public float getdiemhoa(){
        return diemhoa;
    }
   
    public float tinhdiemtb(float dt, float dl, float dh){
        float dtb;
        dtb=(dt+dl+dh)/3;
        return dtb;
    }
    public void xeploaisv(float dtb){
        if(dtb>=8.0){
            system.out.println("xep loai hoc luc gioi");
        }
        else if(dtb>=6.5){
            system.out.println("xep loai hoc luc kha");
        }   
        else if(dtb>=5.0){
            system.out.println("xep loai hoc luc trung binh");
        }
        else
                system.out.println("xep loai hoc luc yeu");
           
    }
    public void insv(){
        system.out.println("
ho ten sv:"+this.hotensv+"
lop hoc:"+this.lophoc+"
diem toan:"+this.diemtoan+"
diem ly:"+this.diemly+"
diem hoa:"+this.diemhoa);
    }
}
 
class giangvien{
    private string lopday,hotengv;
    private int namsinh;
    private float luong;
    // dat lop day va lay lop day
    public void setlopday(string ld){
        this.lopday= ld;
    }
    public string getlopdaysv(){
        return lopday;
    }
   
    // dat lop day va lay ho ten
        public void sethotengv(string htgv){
            this.hotengv= htgv;
        }
        public string gethoten(){
            return hotengv;
        }
       
        // dat lop day va lay nam sinh
        public void setnamsinhgv(int ns){
            this.namsinh= ns;
        }
        public int getnamsinh(){
            return namsinh;
        }
       
        // dat lop day va lay luong
        public void setluong(float l){
            this.luong= l;
        }
        public float getluong(){
            return luong;
        }
        public void ingv(){
            system.out.println("
ho ten gv:"+this.hotengv+"
lop day:"+this.lopday+"
nam sinh:"+this.namsinh+"
luong:"+this.luong);
        }
}
 
 
 
public class mainsetandget {
 
    public static void main(string[] args) {
        sinhvien sv= new sinhvien();
        sv.sethotensv("nguyen a");
        sv.setlophoc("cntt");
        sv.setdiemtoan(8.0f);
        sv.setdiemly(9.5f);
        sv.setdiemhoa(8.0f);
        sv.insv();
        float dtb;
        dtb= sv.tinhdiemtb(sv.getdiemtoan(), sv.getdiemly(), sv.getdiemhoa());
        system.out.println("diem trung binh sinh vien la:"+dtb);
        sv.xeploaisv(dtb);
        giangvien gv= new giangvien();
        gv.sethotengv("nguyen b");
        gv.setlopday("xay dung");
        gv.setnamsinhgv(1989);
        gv.setluong(4000000.0f);
        gv.ingv();
        if(sv.getlophoc().equals(gv.getlopdaysv()))   
        {
            system.out.println("co day sinh vien");
           
        }
        else system.out.println("khong day sinh vien");
       
    }
 
}

mình lười tô màu chữ quá à nên vậy thôi...

**webcongnghe01** · 11-07-2013, 07:00 AM

mong các bạn chỉ bảo giúp. cảm ơn!
class sinhvien
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[color=#000000]
package nhansu[/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]sinhvien [/color][color=#007700]{    private [/color][color=#0000bb]string hoten[/color][color=#007700], [/color][color=#0000bb]lophoc[/color][color=#007700];    private [/color][color=#0000bb]float toan[/color][color=#007700], [/color][color=#0000bb]ly[/color][color=#007700], [/color][color=#0000bb]hoa[/color][color=#007700];     public [/color][color=#0000bb]string gethoten[/color][color=#007700]() {        return [/color][color=#0000bb]hoten[/color][color=#007700];    }     public [/color][color=#0000bb]void sethoten[/color][color=#007700]([/color][color=#0000bb]string hoten[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]hoten [/color][color=#007700]= [/color][color=#0000bb]hoten[/color][color=#007700];    }     public [/color][color=#0000bb]string getlophoc[/color][color=#007700]() {        return [/color][color=#0000bb]lophoc[/color][color=#007700];    }     public [/color][color=#0000bb]void setlophoc[/color][color=#007700]([/color][color=#0000bb]string lophoc[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]lophoc [/color][color=#007700]= [/color][color=#0000bb]lophoc[/color][color=#007700];    }     public [/color][color=#0000bb]float gettoan[/color][color=#007700]() {        return [/color][color=#0000bb]toan[/color][color=#007700];    }     public [/color][color=#0000bb]void settoan[/color][color=#007700]([/color][color=#0000bb]float toan[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]toan [/color][color=#007700]= [/color][color=#0000bb]toan[/color][color=#007700];    }     public [/color][color=#0000bb]float getly[/color][color=#007700]() {        return [/color][color=#0000bb]ly[/color][color=#007700];    }     public [/color][color=#0000bb]void setly[/color][color=#007700]([/color][color=#0000bb]float ly[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]ly [/color][color=#007700]= [/color][color=#0000bb]ly[/color][color=#007700];    }     public [/color][color=#0000bb]float gethoa[/color][color=#007700]() {        return [/color][color=#0000bb]hoa[/color][color=#007700];    }     public [/color][color=#0000bb]void sethoa[/color][color=#007700]([/color][color=#0000bb]float hoa[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]hoa [/color][color=#007700]= [/color][color=#0000bb]hoa[/color][color=#007700];    }     public [/color][color=#0000bb]void nhaptt[/color][color=#007700]() {        [/color][color=#0000bb]scanner scan [/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].print([/color][color=#dd0000]"
ho ten sv:"[/color][color=#007700]);        [/color][color=#0000bb]hoten [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
lop cua sv:"[/color][color=#007700]);        [/color][color=#0000bb]lophoc [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
diem toan:"[/color][color=#007700]);        [/color][color=#0000bb]toan [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextfloat[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
diem ly:"[/color][color=#007700]);        [/color][color=#0000bb]ly [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextfloat[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
diem hoa:"[/color][color=#007700]);        [/color][color=#0000bb]hoa [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextfloat[/color][color=#007700]();    }     public [/color][color=#0000bb]float diemtb[/color][color=#007700]() {        return (float) ([/color][color=#0000bb]toan [/color][color=#007700]+ [/color][color=#0000bb]ly [/color][color=#007700]+ [/color][color=#0000bb]hoa[/color][color=#007700]) / [/color][color=#0000bb]3[/color][color=#007700];    }     public [/color][color=#0000bb]string xeploai[/color][color=#007700]() {        if ([/color][color=#0000bb]diemtb[/color][color=#007700]() >= [/color][color=#0000bb]8[/color][color=#007700]) {            return [/color][color=#dd0000]"gioi"[/color][color=#007700];        } else {            if ([/color][color=#0000bb]diemtb[/color][color=#007700]() >= [/color][color=#0000bb]7[/color][color=#007700]) {                return [/color][color=#dd0000]"kha"[/color][color=#007700];            } else {                if ([/color][color=#0000bb]diemtb[/color][color=#007700]() >= [/color][color=#0000bb]5[/color][color=#007700]) {                    return [/color][color=#dd0000]"trung binh"[/color][color=#007700];                } else {                    return [/color][color=#dd0000]"yeu"[/color][color=#007700];                }            }        }    }     public [/color][color=#0000bb]void hientt[/color][color=#007700]() {        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
" [/color][color=#007700]+ [/color][color=#0000bb]hoten [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]lophoc [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]toan [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]ly                [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]hoa [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]diemtb[/color][color=#007700]() + [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]xeploai[/color][color=#007700]());    }}[/color]

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class giangvien
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Mã nguồn PHP:


[color=#000000]
package nhansu[/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]giangvien [/color][color=#007700]{    private [/color][color=#0000bb]string hoten[/color][color=#007700], [/color][color=#0000bb]lopday[/color][color=#007700];    private [/color][color=#0000bb]int namsinh[/color][color=#007700], [/color][color=#0000bb]luong[/color][color=#007700];     public [/color][color=#0000bb]void nhaptt[/color][color=#007700]() {        [/color][color=#0000bb]scanner scan [/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].print([/color][color=#dd0000]"
ho ten giang vien:"[/color][color=#007700]);        [/color][color=#0000bb]hoten [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
day lop:"[/color][color=#007700]);        [/color][color=#0000bb]lopday [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
nam sinh:"[/color][color=#007700]);        do {            [/color][color=#0000bb]namsinh [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            if ([/color][color=#0000bb]namsinh [/color][color=#007700]< [/color][color=#0000bb]0[/color][color=#007700]) {                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap lai nam sinh"[/color][color=#007700]);            }        } while ([/color][color=#0000bb]namsinh [/color][color=#007700]< [/color][color=#0000bb]0[/color][color=#007700]);        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
luong giang vien:"[/color][color=#007700]);        do {            [/color][color=#0000bb]luong [/color][color=#007700]= [/color][color=#0000bb]scan[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();            if ([/color][color=#0000bb]luong [/color][color=#007700]< [/color][color=#0000bb]0[/color][color=#007700])                [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap lai luong"[/color][color=#007700]);        } while ([/color][color=#0000bb]luong [/color][color=#007700]< [/color][color=#0000bb]0[/color][color=#007700]);    }     public [/color][color=#0000bb]void hientt[/color][color=#007700]() {        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
" [/color][color=#007700]+ [/color][color=#0000bb]hoten [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]lopday [/color][color=#007700]+ [/color][color=#dd0000]"\t" [/color][color=#007700]+ [/color][color=#0000bb]namsinh [/color][color=#007700]+ [/color][color=#dd0000]"\t"                [/color][color=#007700]+ [/color][color=#0000bb]luong[/color][color=#007700]);    }     public [/color][color=#0000bb]string gethoten[/color][color=#007700]() {        return [/color][color=#0000bb]hoten[/color][color=#007700];    }     public [/color][color=#0000bb]string getlopday[/color][color=#007700]() {        return [/color][color=#0000bb]lopday[/color][color=#007700];    }     public [/color][color=#0000bb]int getnamsinh[/color][color=#007700]() {        return [/color][color=#0000bb]namsinh[/color][color=#007700];    }     public [/color][color=#0000bb]int getluong[/color][color=#007700]() {        return [/color][color=#0000bb]luong[/color][color=#007700];    }}[/color]

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main
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Mã nguồn PHP:


[color=#000000]
package nhansu[/color][color=#007700];[/color][color=#ff8000]//tạo package nhân sự, trong có 2 class là sinh viên và giảng viên//class sinh viên gồm các thuộc tính: họ tên, lớp học, điểm toán, lý, hóa.//class giảng viên gồm các thuộc tính: họ tên, lớp dạy, năm sinh, lương.//tạo đối tượng học sinh a.//tạo đối tượng giảng viên b.//các giá trị của thuộc tính a và b nhập vào từ bàn phím.//xử lý dữ liệu báo ra thông tin của a và b, tính và báo ra điểm trung bình của a,//xếp loại học lực, báo b có dạy a hay không!//các thuộc tính để private, sử dụng phương thức getter, setter.//lập trình hướng đối tượng![/color][color=#007700]public class [/color][color=#0000bb]main [/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]sinhvien a[/color][color=#007700]=new [/color][color=#0000bb]sinhvien[/color][color=#007700]();        [/color][color=#0000bb]giangvien b[/color][color=#007700]=new [/color][color=#0000bb]giangvien[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
nhap thong tin sinh vien"[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]nhaptt[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"
nhap thong tin giang vien"[/color][color=#007700]);        [/color][color=#0000bb]b[/color][color=#007700].[/color][color=#0000bb]nhaptt[/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]"
thong tin sinh vien da nhap:"[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]hientt[/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]"
thong tin giang vien da nhap"[/color][color=#007700]);        [/color][color=#0000bb]b[/color][color=#007700].[/color][color=#0000bb]hientt[/color][color=#007700]();        if(([/color][color=#0000bb]b[/color][color=#007700].[/color][color=#0000bb]getlopday[/color][color=#007700]()).[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]getlophoc[/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]"
giang vien "[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700].[/color][color=#0000bb]gethoten[/color][color=#007700]()+[/color][color=#dd0000]" day sinh vien "[/color][color=#007700]+[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]gethoten[/color][color=#007700]());        }        else {            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"
giang vien "[/color][color=#007700]+[/color][color=#0000bb]b[/color][color=#007700].[/color][color=#0000bb]gethoten[/color][color=#007700]()+[/color][color=#dd0000]" khong day sinh vien "[/color][color=#007700]+[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]gethoten[/color][color=#007700]());        }    }}[/color]

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**hoangtailieu** · 11-26-2013, 07:00 AM

cho hỏi phương thức kiểm tra b có dạy a ko mình viết trong class giảng viên có được ko ạ? thanks!

**phuong_gdvn** · 11-26-2013, 07:00 AM

bạn nào lập trình android thì chú ý việc sử dụng getter và setter nhé.
tips: http://developer.android.com/training/articles/perf-tips.html#getterssetters

**thanhtanhcm** · 12-16-2013, 07:00 AM

anh tiasangmoi92: cho em hỏi một chút:
ở phần class giangvien do 1 giảng viên có thể dạy nhiều lớp nên em tạo ra 3 phương thức này:
private string [] lopday =new string [10];

public string[] getlopday() {
return lopday;
}
public void setlopday(string[] lopday) {
this.lopday = lopday;
}
public void input(){
scanner inp =new scanner(system.in);
system.out.println("nhap so lop day:");
int n = inp.nextint();
system.out.println(" nhap ten lop day:");
for(int i=0;i<n;i++){
system.out.println("lop["+i+"]:");
lopday=inp.nextline();
inp.nextline();
}
}
nhưng đến lúc việc xử lí nhập xuất thì không biết như thế nào?
giả sử giảng viên dạy 3 lớp, lúc nhập thì được nhưng đến lúc xuất ra thì em gọi ở hàm main bằng phương thức getlopday(); thì lại không in ra đc. mong bác chỉ giúp/

**dienhoahalinh** · 12-24-2013, 07:00 AM

Gửi bởi mr_gru

anh tiasangmoi92: cho em hỏi một chút:
ở phần class giangvien do 1 giảng viên có thể dạy nhiều lớp nên em tạo ra 3 phương thức này:
private string [] lopday =new string [10];

public string[] getlopday() {
return lopday;
}
public void setlopday(string[] lopday) {
this.lopday = lopday;
}
public void input(){
scanner inp =new scanner(system.in);
system.out.println("nhap so lop day:");
int n = inp.nextint();
system.out.println(" nhap ten lop day:");
for(int i=0;i<n;i++){
system.out.println("lop["+i+"]:");
lopday=inp.nextline();
inp.nextline();
}
}
nhưng đến lúc việc xử lí nhập xuất thì không biết như thế nào?
giả sử giảng viên dạy 3 lớp, lúc nhập thì được nhưng đến lúc xuất ra thì em gọi ở hàm main bằng phương thức getlopday(); thì lại không in ra đc. mong bác chỉ giúp/

Mã nguồn PHP:


[color=#000000]
[/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]n[/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]"lop["[/color][color=#007700]+[/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#dd0000]"]:"[/color][color=#007700]);[/color][color=#0000bb]lopday[/color][color=#007700]=[/color][color=#0000bb]inp[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();[/color][color=#0000bb]inp[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();}[/color]

bạn chú ý lopday ở đây là mảng, khi nhập là nhập mỗi phần tử của mảng, nên phải là

Mã nguồn PHP:


[color=#000000]
lopday[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][/color]

mới đúng, bạn thử xem! :d

**visao** · 12-24-2013, 07:00 AM

Gửi bởi tiasangmoi92

Mã nguồn PHP:


[color=#000000]
[/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]n[/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]"lop["[/color][color=#007700]+[/color][color=#0000bb]i[/color][color=#007700]+[/color][color=#dd0000]"]:"[/color][color=#007700]);[/color][color=#0000bb]lopday[/color][color=#007700]=[/color][color=#0000bb]inp[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();[/color][color=#0000bb]inp[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]();}[/color]

bạn chú ý lopday ở đây là mảng, khi nhập là nhập mỗi phần tử của mảng, nên phải là

Mã nguồn PHP:


[color=#000000]
lopday[/color][color=#007700][[/color][color=#0000bb]i[/color][color=#007700]][/color]

mới đúng, bạn thử xem! :d

được rồi bác ạ, ở hàm main chỉ cần tạo thế này là nó sẽ trả về các giá trị đã nhập

Mã:

for(int i= 0;i<3;i++){
            system.out.println("show ra danh sach lop"+b.getlopday()[i]);
        }

**pntinfo5** · 01-21-2014, 07:00 AM

giảng viên:
<div class="bbcodeblock bbcodequote bbcmspoilerblock">
<div class="attribution type"><noscript>spoiler (move your mouse to the spoiler area to reveal the content)</noscript>

show spoiler
hide spoiler

</div>
<div class="quotecontent">
<div class="bbcm_spoiler_noscript"><blockquote>

Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]giangvien [/color][color=#007700]{    private [/color][color=#0000bb]string hoten[/color][color=#007700];    private [/color][color=#0000bb]string lopday[/color][color=#007700];    private [/color][color=#0000bb]int namsinh[/color][color=#007700];    private [/color][color=#0000bb]float luong[/color][color=#007700];     public [/color][color=#0000bb]void sethoten[/color][color=#007700]([/color][color=#0000bb]string hoten[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]hoten [/color][color=#007700]= [/color][color=#0000bb]hoten[/color][color=#007700];    }     public [/color][color=#0000bb]string gethoten[/color][color=#007700](){        return [/color][color=#0000bb]hoten[/color][color=#007700];    }     public [/color][color=#0000bb]void setlopday[/color][color=#007700]([/color][color=#0000bb]string lopday[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]lopday [/color][color=#007700]= [/color][color=#0000bb]lopday[/color][color=#007700];    }     public [/color][color=#0000bb]string getlopday[/color][color=#007700](){        return [/color][color=#0000bb]lopday[/color][color=#007700];    }     public [/color][color=#0000bb]void setnamsinh[/color][color=#007700]([/color][color=#0000bb]int namsinh[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]namsinh [/color][color=#007700]= [/color][color=#0000bb]namsinh[/color][color=#007700];    }     public [/color][color=#0000bb]int getnamsinh[/color][color=#007700](){        return [/color][color=#0000bb]namsinh[/color][color=#007700];    }     public [/color][color=#0000bb]void setluong[/color][color=#007700]([/color][color=#0000bb]float luong[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]luong [/color][color=#007700]= [/color][color=#0000bb]luong[/color][color=#007700];    }     public [/color][color=#0000bb]float getluong[/color][color=#007700](){        return [/color][color=#0000bb]luong[/color][color=#007700];    }}[/color]

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

sinh viên:
<div class="bbcodeblock bbcodequote bbcmspoilerblock">
<div class="attribution type"><noscript>spoiler (move your mouse to the spoiler area to reveal the content)</noscript>

show spoiler
hide spoiler

</div>
<div class="quotecontent">
<div class="bbcm_spoiler_noscript"><blockquote>

Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]sinhvien [/color][color=#007700]{    private [/color][color=#0000bb]string hoten[/color][color=#007700];    private [/color][color=#0000bb]string lophoc[/color][color=#007700];    private [/color][color=#0000bb]float toan[/color][color=#007700], [/color][color=#0000bb]ly[/color][color=#007700], [/color][color=#0000bb]hoa[/color][color=#007700];     public [/color][color=#0000bb]void sethoten[/color][color=#007700]([/color][color=#0000bb]string hoten[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]hoten [/color][color=#007700]= [/color][color=#0000bb]hoten[/color][color=#007700];    }       public [/color][color=#0000bb]string gethoten[/color][color=#007700](){        return [/color][color=#0000bb]hoten[/color][color=#007700];    }     public [/color][color=#0000bb]void setlophoc[/color][color=#007700]([/color][color=#0000bb]string lophoc[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]lophoc [/color][color=#007700]= [/color][color=#0000bb]lophoc[/color][color=#007700];    }       public [/color][color=#0000bb]string getlophoc[/color][color=#007700](){        return [/color][color=#0000bb]lophoc[/color][color=#007700];    }       public [/color][color=#0000bb]void settoan[/color][color=#007700]([/color][color=#0000bb]float toan[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]toan [/color][color=#007700]= [/color][color=#0000bb]toan[/color][color=#007700];    }       public [/color][color=#0000bb]float gettoan[/color][color=#007700](){        return [/color][color=#0000bb]toan[/color][color=#007700];    }       public [/color][color=#0000bb]void setly[/color][color=#007700]([/color][color=#0000bb]float ly[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]ly [/color][color=#007700]= [/color][color=#0000bb]ly[/color][color=#007700];    }          public [/color][color=#0000bb]float getly[/color][color=#007700](){        return [/color][color=#0000bb]ly[/color][color=#007700];    }       public [/color][color=#0000bb]void sethoa[/color][color=#007700]([/color][color=#0000bb]float hoa[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]hoa [/color][color=#007700]= [/color][color=#0000bb]hoa[/color][color=#007700];    }       public [/color][color=#0000bb]float gethoa[/color][color=#007700](){        return [/color][color=#0000bb]hoa[/color][color=#007700];    }       public [/color][color=#0000bb]float diemtb[/color][color=#007700](){        return (float)([/color][color=#0000bb]toan [/color][color=#007700]+ [/color][color=#0000bb]ly [/color][color=#007700]+ [/color][color=#0000bb]hoa[/color][color=#007700])/[/color][color=#0000bb]3[/color][color=#007700];    }       public [/color][color=#0000bb]string xeploai[/color][color=#007700]([/color][color=#0000bb]float diemtb[/color][color=#007700]){        if ( [/color][color=#0000bb]diemtb [/color][color=#007700]>= [/color][color=#0000bb]8[/color][color=#007700])            return [/color][color=#dd0000]"hoc sinh gioi"[/color][color=#007700];                   if ([/color][color=#0000bb]diemtb [/color][color=#007700]>= [/color][color=#0000bb]6.5[/color][color=#007700])            return [/color][color=#dd0000]"hoc sinh kha"[/color][color=#007700];                   if ( [/color][color=#0000bb]diemtb [/color][color=#007700]>= [/color][color=#0000bb]5 [/color][color=#007700])            return [/color][color=#dd0000]"hoc sinh trung binh"[/color][color=#007700];        return [/color][color=#dd0000]"hoc sinh yeu"[/color][color=#007700];    }}[/color]

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

main:
<div class="bbcodeblock bbcodequote bbcmspoilerblock">
<div class="attribution type"><noscript>spoiler (move your mouse to the spoiler area to reveal the content)</noscript>

show spoiler
hide spoiler

</div>
<div class="quotecontent">
<div class="bbcm_spoiler_noscript"><blockquote>

Mã nguồn PHP:


[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]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]scanner input2 [/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]sinhvien sv [/color][color=#007700]= new [/color][color=#0000bb]sinhvien[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap ten sinh vien: "[/color][color=#007700]);        [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]sethoten[/color][color=#007700]([/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]());        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap lop: "[/color][color=#007700]);        [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]setlophoc[/color][color=#007700]([/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]());        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap diem toan:"[/color][color=#007700]);        [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]settoan[/color][color=#007700]([/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextfloat[/color][color=#007700]());        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap diem ly:"[/color][color=#007700]);        [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]setly[/color][color=#007700]([/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextfloat[/color][color=#007700]());        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap diem hoa: "[/color][color=#007700]);        [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]sethoa[/color][color=#007700]([/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextfloat[/color][color=#007700]());               [/color][color=#0000bb]giangvien gv [/color][color=#007700]= new [/color][color=#0000bb]giangvien[/color][color=#007700]();        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap ten giang vien:"[/color][color=#007700]);        [/color][color=#0000bb]gv[/color][color=#007700].[/color][color=#0000bb]sethoten[/color][color=#007700]([/color][color=#0000bb]input2[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]());        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap lop giang vien giang day:"[/color][color=#007700]);        [/color][color=#0000bb]gv[/color][color=#007700].[/color][color=#0000bb]setlopday[/color][color=#007700]([/color][color=#0000bb]input2[/color][color=#007700].[/color][color=#0000bb]nextline[/color][color=#007700]());        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap nam sinh:"[/color][color=#007700]);        [/color][color=#0000bb]gv[/color][color=#007700].[/color][color=#0000bb]setnamsinh[/color][color=#007700]([/color][color=#0000bb]input2[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]());        [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].print([/color][color=#dd0000]"nhap luong:"[/color][color=#007700]);        [/color][color=#0000bb]gv[/color][color=#007700].[/color][color=#0000bb]setluong[/color][color=#007700]([/color][color=#0000bb]input2[/color][color=#007700].[/color][color=#0000bb]nextfloat[/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]"thong tin sinh vien"[/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]"ten: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]gethoten[/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]"lop: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]getlophoc[/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]"diem toan: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]gettoan[/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]"diem ly: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]getly[/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]"diem hoa: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]gethoa[/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]"diem trung binh: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]diemtb[/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]"xep loai: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]xeploai[/color][color=#007700]([/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]diemtb[/color][color=#007700]()));        if ( [/color][color=#0000bb]gv[/color][color=#007700].[/color][color=#0000bb]getlopday[/color][color=#007700]().[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]getlophoc[/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]"giang vien: " [/color][color=#007700]+ [/color][color=#0000bb]gv[/color][color=#007700].[/color][color=#0000bb]gethoten[/color][color=#007700]() + [/color][color=#dd0000]" co day sinh vien: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]getlophoc[/color][color=#007700]());        else            [/color][color=#0000bb]system[/color][color=#007700].[/color][color=#0000bb]out[/color][color=#007700].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"giang vien: " [/color][color=#007700]+ [/color][color=#0000bb]gv[/color][color=#007700].[/color][color=#0000bb]gethoten[/color][color=#007700]() + [/color][color=#dd0000]" khong day sinh vien: " [/color][color=#007700]+ [/color][color=#0000bb]sv[/color][color=#007700].[/color][color=#0000bb]getlophoc[/color][color=#007700]());    }[/color]

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

**nhaphochungcu** · 02-18-2014, 07:00 AM

[

Mã:

/*
* to change this license header, choose license headers in project properties.
* to change this template file, choose tools | templates
* and open the template in the editor.
*/
 
package nhansu.thanhkoy.basic;
 
import java.util.scanner;
/**
*
* @author thanh koy
*/
class thongtin {
    private string hoten;
    private string lop;
    private string truong;
    private int tuoi;
   
    public void sethoten(string hoten){
        this.hoten = hoten;
    }
    public string gethoten(){
        return hoten;
    }
    public void setlop(string lop){
        this.lop = lop;
    }
    public string getlop(){
        return lop;
    }
    public void settruong(string truong){
        this.truong = truong;
    }
    public string gettruong(){
        return truong;
    }
    public void settuoi(int tuoi){
        this.tuoi = tuoi;
    }
    public int gettuoi(){
        return tuoi;
    }
}
public class thanhkoy{
    public static void main(string[] args) {
     
        string ten;
        int tuoi;
        string lop;
        string truong;
        scanner input = new scanner(system.in);
        thongtin tt = new thongtin();
       
        system.out.print("nhap ten: ");
        ten = input.nextline();
       
        system.out.print("lop: ");
        lop = input.nextline();
        system.out.print("tuoi: ");
        tuoi = input.nextint();
       
        system.out.println("truong: ");
        truong = input.nextline();
       
        tt.sethoten(ten);
        tt.setlop(lop);
        tt.settruong(truong);
        tt.settuoi(tuoi);
       
       
        system.out.println("sinh vien: "+tt.gethoten()+" tuoi: "+tt.gettuoi()" lop: "+tt.getlop()+" truong: "+tt.gettruong());
       
    }
}

][/spoiler]
mình mới học java. mọi người sửa code giúp mình với!

**Best4u** · 02-20-2014, 07:00 AM

mọi người ơi cho xem hộ mình đoạn code này zới nó có bị lỗi j ko
public void nhapsv()
{
//scanner nhap = new scanner(system.in) ;
system.out.print("nhập tên sinh viên :") ;
name = nhap.nextline() ;
nhap.nextline() ;
system.out.print("nhập lớp của sinh viên :");
classname = nhap.nextline() ;
nhap.nextline() ;
system.out.print("nhập điểm toán của sinh viên") ;
toan = nhap.nextfloat() ;
system.out.print("nhập điểm lý của sinh viên") ;
ly = nhap.nextfloat() ;
system.out.print("nhập điểm hóa của sinh viên") ;
hoa = nhap.nextfloat() ;
}

public void nhapds()
{

sinhvien sv1[] = new sinhvien[50] ;
for (int i = 0 ;i <5 ;i++)
{
system.out.print("nhập tên sinh viên :") ;
sv1.name = nhap.nextline() ;
//nhap.nextline() ;
system.out.print("nhập lớp của sinh viên :");
sv1.classname = nhap.nextline() ;
//nhap.nextline() ;
system.out.print("nhập điểm toán của sinh viên") ;
sv1.toan = nhap.nextfloat() ;
system.out.print("nhập điểm lý của sinh viên") ;
sv1.ly = nhap.nextfloat() ;
system.out.print("nhập điểm hóa của sinh viên") ;
sv1.hoa = nhap.nextfloat() ;
}
}

Chủ đề: Bài 15: Phương thức setter và getter trong Java

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