Bài 19: Phương thức khởi tạo (constructor) trong Java

**ngoc.hong734** · 10-25-2013, 07:00 AM

bài của mình này, càng ngày càng hiểu được thêm một chút, ko biết các bài sau có khó không.
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Mã nguồn PHP:


[color=#000000]
package com[/color][color=#007700].[/color][color=#0000bb]hanhnv[/color][color=#007700].[/color][color=#0000bb]bai19[/color][color=#007700]; public class [/color][color=#0000bb]bai19 [/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]bill billwithoutdiscount [/color][color=#007700]= new [/color][color=#0000bb]bill[/color][color=#007700]([/color][color=#dd0000]"noodle"[/color][color=#007700], [/color][color=#dd0000]"omachi"[/color][color=#007700], [/color][color=#0000bb]6000[/color][color=#007700], [/color][color=#0000bb]30[/color][color=#007700]);        [/color][color=#0000bb]bill billafterdiscount [/color][color=#007700]= new [/color][color=#0000bb]bill[/color][color=#007700]([/color][color=#dd0000]"noodle"[/color][color=#007700], [/color][color=#dd0000]"omachi"[/color][color=#007700], [/color][color=#0000bb]6000[/color][color=#007700], [/color][color=#0000bb]30[/color][color=#007700], [/color][color=#0000bb]5[/color][color=#007700]);    } } class [/color][color=#0000bb]bill [/color][color=#007700]{    private [/color][color=#0000bb]string productname[/color][color=#007700];    private [/color][color=#0000bb]string productcode[/color][color=#007700];    private [/color][color=#0000bb]int productprice[/color][color=#007700];    private [/color][color=#0000bb]int productquantity[/color][color=#007700];    private [/color][color=#0000bb]int productdiscount[/color][color=#007700];     public [/color][color=#0000bb]bill[/color][color=#007700]([/color][color=#0000bb]string name[/color][color=#007700], [/color][color=#0000bb]string code[/color][color=#007700], [/color][color=#0000bb]int price[/color][color=#007700], [/color][color=#0000bb]int quantity[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]productname [/color][color=#007700]= [/color][color=#0000bb]name[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]productcode [/color][color=#007700]= [/color][color=#0000bb]code[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]productprice [/color][color=#007700]= [/color][color=#0000bb]price[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]productquantity [/color][color=#007700]= [/color][color=#0000bb]quantity[/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]"total of money you have to pay for " [/color][color=#007700]+ [/color][color=#0000bb]quantity                [/color][color=#007700]+ [/color][color=#dd0000]" units " [/color][color=#007700]+ [/color][color=#0000bb]code [/color][color=#007700]+ [/color][color=#dd0000]" " [/color][color=#007700]+ [/color][color=#0000bb]name [/color][color=#007700]+ [/color][color=#dd0000]" with price " [/color][color=#007700]+ [/color][color=#0000bb]price                [/color][color=#007700]+ [/color][color=#dd0000]" vnd per unit " [/color][color=#007700]+ [/color][color=#dd0000]" is: " [/color][color=#007700]+ ([/color][color=#0000bb]quantity [/color][color=#007700]* [/color][color=#0000bb]price[/color][color=#007700]) + [/color][color=#dd0000]" vnd."[/color][color=#007700]);    }     public [/color][color=#0000bb]bill[/color][color=#007700]([/color][color=#0000bb]string name[/color][color=#007700], [/color][color=#0000bb]string code[/color][color=#007700], [/color][color=#0000bb]int price[/color][color=#007700], [/color][color=#0000bb]int quantity[/color][color=#007700], [/color][color=#0000bb]int discount[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]productname [/color][color=#007700]= [/color][color=#0000bb]name[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]productcode [/color][color=#007700]= [/color][color=#0000bb]code[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]productprice [/color][color=#007700]= [/color][color=#0000bb]price[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]productquantity [/color][color=#007700]= [/color][color=#0000bb]quantity[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]productdiscount [/color][color=#007700]= [/color][color=#0000bb]discount[/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]"total of money you have to pay for " [/color][color=#007700]+ [/color][color=#0000bb]quantity                [/color][color=#007700]+ [/color][color=#dd0000]" units " [/color][color=#007700]+ [/color][color=#0000bb]code [/color][color=#007700]+ [/color][color=#dd0000]" " [/color][color=#007700]+ [/color][color=#0000bb]name [/color][color=#007700]+ [/color][color=#dd0000]" with price " [/color][color=#007700]+ [/color][color=#0000bb]price                [/color][color=#007700]+ [/color][color=#dd0000]" vnd per unit " [/color][color=#007700]+ [/color][color=#dd0000]" after promotion is: "                [/color][color=#007700]+ (([/color][color=#0000bb]quantity [/color][color=#007700]* [/color][color=#0000bb]price[/color][color=#007700]) - ([/color][color=#0000bb]quantity [/color][color=#007700]* [/color][color=#0000bb]price [/color][color=#007700]* [/color][color=#0000bb]discount [/color][color=#007700]/ [/color][color=#0000bb]100[/color][color=#007700]))                + [/color][color=#dd0000]" vnd. :d"[/color][color=#007700]);    } }[/color]

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**vongocbao** · 10-31-2013, 07:00 AM

Mã:

/*
class đơn hàng có các thuộc tính: tên hàng, mã hàng, giá bán, số lượng, tỷ lệ % giảm giá.
tạo constructor có 4 thuộc tính đầu và thêm một overload constructor với 5 thuộc tính .
cả 2 constructor đều show ra tổng tiền khi các đối tượng đơn hàng được tạo ra
*/
 
package constractor;
 
class donhang{
    private final string tenhang;
    private final string mahang;
    private final int giaban;
    private final int soluong;
    private int phantramgiamgia;
    private final float tongtien;
   
   
    public donhang(string th, string mh, int g, int sl){
        this.tenhang=th;
        this.mahang=mh;
        this.giaban=g;
        this.soluong=sl;
        this.tongtien=sl*g;
        system.out.println("
ten hang: "+this.tenhang+ "
ma hang: "+this.mahang+"
gia: "+this.giaban+"
so luong: "+this.soluong+"
tong tien: "+this.tongtien);
    }
    public donhang(string th, string mh, int g, int sl, int pt){
        this.tenhang= th;
        this.mahang=mh;
        this.giaban=g;
        this.soluong=sl;
        this.phantramgiamgia=pt;
        this.tongtien=(float) (sl*g-sl*g*pt/100);
 
        system.out.println("ten hang: "+this.tenhang+ "
ma hang: "+this.mahang+"
gia: "+this.giaban+"
so luong: "+this.soluong+"
phan tram giam gia: "+this.phantramgiamgia+"
tong tien: "+this.tongtien);
    }
}
 
public class maincontractor {
    public static void main(string []args){
        donhang d1= new donhang("may tinh","123t", 100, 2);
        system.out.println("");
        donhang d2= new donhang("may tinh","123t", 100, 2, 20);
       
    }
}

**kndkhoa** · 10-31-2013, 07:00 AM

Mã:

/*
class đơn hàng có các thuộc tính: tên hàng, mã hàng, giá bán, số lượng, tỷ lệ % giảm giá.
tạo constructor có 4 thuộc tính đầu và thêm một overload constructor với 5 thuộc tính .
cả 2 constructor đều show ra tổng tiền khi các đối tượng đơn hàng được tạo ra
*/
 
package constractor;
 
class donhang{
    private final string tenhang;
    private final string mahang;
    private final int giaban;
    private final int soluong;
    private int phantramgiamgia;
    private final float tongtien;
   
   
    public donhang(string th, string mh, int g, int sl){
        this.tenhang=th;
        this.mahang=mh;
        this.giaban=g;
        this.soluong=sl;
        this.tongtien=sl*g;
        system.out.println("
ten hang: "+this.tenhang+ "
ma hang: "+this.mahang+"
gia: "+this.giaban+"
so luong: "+this.soluong+"
tong tien: "+this.tongtien);
    }
    public donhang(string th, string mh, int g, int sl, int pt){
        this.tenhang= th;
        this.mahang=mh;
        this.giaban=g;
        this.soluong=sl;
        this.phantramgiamgia=pt;
        this.tongtien=(float) (sl*g-sl*g*pt/100);
 
        system.out.println("ten hang: "+this.tenhang+ "
ma hang: "+this.mahang+"
gia: "+this.giaban+"
so luong: "+this.soluong+"
phan tram giam gia: "+this.phantramgiamgia+"
tong tien: "+this.tongtien);
    }
}
 
public class maincontractor {
    public static void main(string []args){
        donhang d1= new donhang("may tinh","123t", 100, 2);
        system.out.println("");
        donhang d2= new donhang("may tinh","123t", 100, 2, 20);
       
    }
}

**vuongkhanh** · 11-02-2013, 07:00 AM

123

**Trandinhtienzxzczv** · 12-14-2013, 07:00 AM

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Mã:

/*
    class đơn hàng có các thuộc tính: tên hàng, mã hàng, giá bán, số lượng, tỷ lệ % giảm giá. tạo constructor có 4 thuộc tính đầu và thêm một overload constructor với 5 thuộc tính .
    cả 2 constructor đều show ra tổng tiền khi các đối tượng đơn hàng được tạo ra! (làm tương tự ví dụ trên).
*/
package demo_constructor;
 
class donhang
{
    private string donhang;
    private string mahang;
    private long giaban;
    private int soluong;
    private int tilegiamgia;
   
    public donhang(string donhang,string mahang,long giaban,int soluong)
    {
        this.donhang = donhang;
        this.giaban = giaban;
        this.mahang = mahang;
        this.soluong = soluong;
       
        system.out.println("tổng tiền: "+(giaban*soluong));
    }
   
    public donhang(string donhang,string mahang,long giaban,int soluong, int tilegiamgia)
    {
        this.donhang = donhang;
        this.giaban = giaban;
        this.mahang = mahang;
        this.soluong = soluong;
        this.tilegiamgia = tilegiamgia;
       
        system.out.println("tổng tiền: "+(giaban*soluong-(giaban*soluong*tilegiamgia/100)));
    }
}
 
public class bai_tap {
    public static void main(string[] args) {
        donhang bh1 = new donhang("ok","123",20000,2);
        donhang bh2 = new donhang("ok","123",20000,2,10);
    }
}

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**6y45gh54f54y645** · 01-23-2014, 07:00 AM

đơn hàng:
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Mã nguồn PHP:


[color=#000000]
[/color][color=#007700]public class [/color][color=#0000bb]donhang [/color][color=#007700]{    private [/color][color=#0000bb]string tenhang[/color][color=#007700];    private [/color][color=#0000bb]string mahang[/color][color=#007700];    private [/color][color=#0000bb]float giaban[/color][color=#007700];    private [/color][color=#0000bb]int soluong[/color][color=#007700];    private [/color][color=#0000bb]float tilegiam[/color][color=#007700];     public [/color][color=#0000bb]string gettenhang[/color][color=#007700]() {        return [/color][color=#0000bb]tenhang[/color][color=#007700];    }     public [/color][color=#0000bb]void settenhang[/color][color=#007700]([/color][color=#0000bb]string tenhang[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]tenhang [/color][color=#007700]= [/color][color=#0000bb]tenhang[/color][color=#007700];    }     public [/color][color=#0000bb]string getmahang[/color][color=#007700]() {        return [/color][color=#0000bb]mahang[/color][color=#007700];    }     public [/color][color=#0000bb]void setmahang[/color][color=#007700]([/color][color=#0000bb]string mahang[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]mahang [/color][color=#007700]= [/color][color=#0000bb]mahang[/color][color=#007700];    }     public [/color][color=#0000bb]float getgiaban[/color][color=#007700]() {        return [/color][color=#0000bb]giaban[/color][color=#007700];    }     public [/color][color=#0000bb]void setgiaban[/color][color=#007700]([/color][color=#0000bb]float giaban[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]giaban [/color][color=#007700]= [/color][color=#0000bb]giaban[/color][color=#007700];    }     public [/color][color=#0000bb]int getsoluong[/color][color=#007700]() {        return [/color][color=#0000bb]soluong[/color][color=#007700];    }     public [/color][color=#0000bb]void setsoluong[/color][color=#007700]([/color][color=#0000bb]int soluong[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]soluong [/color][color=#007700]= [/color][color=#0000bb]soluong[/color][color=#007700];    }     public [/color][color=#0000bb]float gettilegiam[/color][color=#007700]() {        return [/color][color=#0000bb]tilegiam[/color][color=#007700];    }     public [/color][color=#0000bb]void settilegiam[/color][color=#007700]([/color][color=#0000bb]float tilegiam[/color][color=#007700]) {        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]tilegiam [/color][color=#007700]= [/color][color=#0000bb]tilegiam[/color][color=#007700];    }       public [/color][color=#0000bb]donhang[/color][color=#007700]() {    }       public [/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#0000bb]string tenhang[/color][color=#007700], [/color][color=#0000bb]string mahang[/color][color=#007700], [/color][color=#0000bb]float giaban[/color][color=#007700], [/color][color=#0000bb]int soluong[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]tenhang [/color][color=#007700]= [/color][color=#0000bb]tenhang[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]mahang [/color][color=#007700]= [/color][color=#0000bb]mahang[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]giaban [/color][color=#007700]= [/color][color=#0000bb]giaban[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]soluong [/color][color=#007700]= [/color][color=#0000bb]soluong[/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 hang: " [/color][color=#007700]+ [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]tenhang[/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]"ma hang: " [/color][color=#007700]+ [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]mahang[/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]"gia ban: " [/color][color=#007700]+ [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]giaban[/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]"so luong: " [/color][color=#007700]+ [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]soluong[/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]"tong tien: " [/color][color=#007700]+ (float) ([/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]soluong [/color][color=#007700]* [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]giaban[/color][color=#007700]));    }    public [/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#0000bb]string tenhang[/color][color=#007700], [/color][color=#0000bb]string mahang[/color][color=#007700], [/color][color=#0000bb]float giaban[/color][color=#007700], [/color][color=#0000bb]int soluong[/color][color=#007700], [/color][color=#0000bb]float tilegiam[/color][color=#007700]){        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]tenhang [/color][color=#007700]= [/color][color=#0000bb]tenhang[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]mahang [/color][color=#007700]= [/color][color=#0000bb]mahang[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]giaban [/color][color=#007700]= [/color][color=#0000bb]giaban[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]soluong [/color][color=#007700]= [/color][color=#0000bb]soluong[/color][color=#007700];        [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]tilegiam [/color][color=#007700]= [/color][color=#0000bb]tilegiam[/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 hang: " [/color][color=#007700]+ [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]tenhang[/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]"ma hang: " [/color][color=#007700]+ [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]mahang[/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]"gia ban: " [/color][color=#007700]+ [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]giaban[/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]"so luong: " [/color][color=#007700]+ [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]soluong[/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]"ti le giam: " [/color][color=#007700]+ [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]tilegiam[/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]"tong tien: " [/color][color=#007700]+ (float) ([/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]soluong [/color][color=#007700]* [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]giaban [/color][color=#007700]- ([/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]soluong [/color][color=#007700]* [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]giaban [/color][color=#007700]* [/color][color=#0000bb]this[/color][color=#007700].[/color][color=#0000bb]tilegiam[/color][color=#007700])));           }}[/color]

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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]donhang dh [/color][color=#007700]= new [/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"usb"[/color][color=#007700], [/color][color=#dd0000]"usb"[/color][color=#007700],[/color][color=#0000bb]10[/color][color=#007700],[/color][color=#0000bb]10[/color][color=#007700]);    [/color][color=#0000bb]donhang dh2 [/color][color=#007700]= new [/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"mouse"[/color][color=#007700], [/color][color=#dd0000]"mouse"[/color][color=#007700], [/color][color=#0000bb]10[/color][color=#007700],[/color][color=#0000bb]10[/color][color=#007700],[/color][color=#0000bb]0.5f[/color][color=#007700]);         }[/color]

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**plus1994** · 03-03-2014, 07:00 AM

mn gop ý dùm đi

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Mã:

public class hanghoa {
    string tenhang, mahang;
    int gia,soluong;
    float phantramgiamgia;
 
    public hanghoa(string tenhang, string mahang, int gia, int soluong) {
        this.tenhang = tenhang;
        this.mahang = mahang;
        this.gia = gia;
        this.soluong = soluong;
        system.out.println("tên hàng: "+tenhang+" mã hàng: "+mahang+" gia: "+gia+" số lượng: "+soluong);
        system.out.println("tổng tiền: "+gia*soluong);
    }
 
    public hanghoa(string tenhang, string mahang, int gia, int soluong, float phantramgiamgia) {
        this.tenhang = tenhang;
        this.mahang = mahang;
        this.gia = gia;
        this.soluong = soluong;
        this.phantramgiamgia = phantramgiamgia;
        system.out.println("tên hàng: "+tenhang+"
mã hàng: "+mahang+"
gia: "+gia+"
số lượng: "+soluong);
        system.out.println("tổng tiền: "+gia*soluong*phantramgiamgia);
    }
 
}

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**dulich.hn35** · 03-05-2014, 07:00 AM

Gửi bởi tiasangmoi92

uh, cứ từ từ, cho anh còn kịp viết bài chứ :v

bạn học at7 à. code giỏi vậy. mình học at6b nhưng bây giờ mới bắt đầu học code, mang sách bút xuống hỏi vậy :v

**cobexinh09** · 03-26-2014, 07:00 AM

mong mọi người chỉ bảo thêm :d !
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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 exam19;
 
class order {
 
    private string nameorder;
    private string idorder;
    private int priceorder;
    private int numbers;
    private int saleof;
 
    public order(string name, string id, int price, int number) {
        this.nameorder = name;
        this.idorder = id;
        this.priceorder = price;
        this.numbers = number;
        system.out.println("\tname: " + nameorder + "
\tid: " + idorder + "
\tprice: " + priceorder + "
\tnumbers: " + numbers + "
\ttotal money: " + (priceorder * numbers));
    }
 
    public order(string name1, string id1, int price1, int number1, int sale) {
        this.nameorder = name1;
        this.idorder = id1;
        this.priceorder = price1;
        this.numbers = number1;
        this.saleof = sale;
        system.out.println("\tname: " + nameorder + "
\tid: " + idorder + "
\tprice: " + priceorder + "
\tnumbers: " + numbers + "
\ttotal money: " + (priceorder * numbers - priceorder * numbers * saleof / 100));
    }
}
 
public class constructor {
 
    public static void main(string[] args) {
        system.out.println("- order 1:");
        order customer = new order("smartphone", "113", 10000000, 2);
        system.out.println("- order 2:");
        order customer1 = new order("laptop", "114", 9500000, 1, 5);
    }
}

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**nguyenthao85** · 04-14-2014, 07:00 AM

mọi người xem giúp em bài này với. xem làm thế này đã ổn chưa

Mã:

public class donhang {
    private string mahang, tenhang;
    private int gia, sl, pt_giam;
 
    public string getmahang() {
        return mahang;
    }
 
    public string gettenhang() {
        return tenhang;
    }
 
    public int getgia() {
        return gia;
    }
 
    public int getsl() {
        return sl;
    }
 
    public int getpt_giam() {
        return pt_giam;
    }
 
    public void setmahang(string mahang) {
        this.mahang = mahang;
    }
 
    public void settenhang(string tenhang) {
        this.tenhang = tenhang;
    }
 
    public void setgia(int gia) {
        this.gia = gia;
    }
 
    public void setsl(int sl) {
        this.sl = sl;
    }
 
    public void setpt_giam(int pt_giam) {
        this.pt_giam = pt_giam;
    }
    public void donhang(){}
    public void donhang(string mah, string tenh, int gia, int sl){
        this.mahang = mah;
        this.tenhang = tenh;
        this.gia = gia;
        this.sl = sl;
        system.out.println("tong tien:"+ this.gia*this.sl);
    }
    public void donhang(string mah, string tenh, int gia, int sl, int ptgiam){
        this.mahang = mah;
        this.tenhang = tenh;
        this.gia = gia;
        this.sl = sl;
        this.pt_giam = ptgiam;
        system.out.println("tong tien:"+(this.gia*this.sl*(100-this.pt_giam))/100);
    }
    public void ininfor(){
        scanner input = new scanner(system.in);
        system.out.println("nhap ma hang:");
        setmahang(input.nextline());
        system.out.println("nhap ten hang:");
        settenhang(input.nextline());
        system.out.println("nhap gia:");
        setgia(input.nextint());
        system.out.println("nhap so luong:");
        setsl(input.nextint());
        system.out.println("nhap phan tram giam gia:");
        setpt_giam(input.nextint());
    }
    public static void main(string[] args) {
        donhang dh1 = new donhang();
        donhang dh2 = new donhang();
        system.out.println("nhap thong tin cho don hang khong duoc giam gia:");
        dh1.ininfor();
        dh1.donhang(dh1.getmahang(), dh1.gettenhang(), dh1.getgia(), dh1.getsl());
        system.out.println("nhap thong tin cho don hang duoc giam gia:");
        dh2.ininfor();
        dh2.donhang(dh2.getmahang(), dh2.gettenhang(), dh2.getgia(), dh2.getsl(), dh2.getpt_giam());
    }
}

Chủ đề: Bài 19: Phương thức khởi tạo (constructor) trong Java

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