Bài 14: Phương thức (method) trong Java

[han phan]

khi mình chạy thì báo lỗi :
exception in thread "main" java.lang.unsupportedoperationexception: not supported yet.
at javabasic.hocsinh.getname(hocsinh.java:59)
at javabasic.quanli.main(quanli.java:51)
java result: 1
bạn giúp mình với,thank bạn!!!

[tranthuhuyen1551]

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import java.util.date;
import java.util.scanner;
public class bai1 {
 
    public static void main(string[] args) {
        hanghoa hh = new hanghoa();
        system.out.println("nhap ten hang hoa: ");
        hh.tenhang = input.nhapten();
        system.out.println("nhap ma hang hoa: ");
        hh.mahang = input.nhapten();
        system.out.println("nhap gia: ");
        hh.giahang = input.nhapso();
        system.out.println("nhap so luong: ");
        hh.soluong = input.nhapso();
        system.out.println();
       
//        in bill
        system.out.println("hóa đơn");
        system.out.println("tên hàng: "+hh.tenhang);
        system.out.println("mã hàng: "+hh.mahang);
        system.out.println("giá: "+hh.giahang+" vnđ");
        system.out.println("số lượng: "+hh.soluong);
        double tien = hh.tongtien();
        system.out.println("thanh tien: " + tien);
        system.out.println("thank you bought!");
 
    }
}
 
class hanghoa {
 
    string tenhang, mahang;
    float giahang, soluong;
 
    public double tongtien() {
        float tien = giahang * soluong;
        date date = new date();
        int h = date.gethours();
       
        if (h > 8 && h < 17) {
            system.out.println("giảm gia: 5%");
            return tien * (1 - 0.05);
        } else {
            system.out.println("giảm giá: 0");
            return tien;
        }
    }
}
 
class input {
 
    public static float nhapso() {
        float n = 0;
        scanner input = new scanner(system.in);
        boolean check = true;
        while (check) {
            try {
                n = input.nextfloat();
                if (n < 0) {
                    system.out.println("gia tri nhap phai > 0, nhap lai!");
                    continue;
                } else {
                    check = false;
                }
            } catch (exception e) {
                system.out.println("chi duoc nhap so, nhap lai!");
                input.nextline();
            }
        }
        return n;
    }
 
    public static string nhapten() {
        scanner input = new scanner(system.in);
        return input.nextline();
    }
}

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[BavnPro]

bai 1:
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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];class [/color][color=#0000bb]hanghoa[/color][color=#007700]{    public [/color][color=#0000bb]string tenhang[/color][color=#007700];    public [/color][color=#0000bb]string mahang[/color][color=#007700];    public [/color][color=#0000bb]float giahang[/color][color=#007700];    public [/color][color=#0000bb]int soluong[/color][color=#007700];    public [/color][color=#0000bb]float time[/color][color=#007700];    public [/color][color=#0000bb]void  danhsachmathang[/color][color=#007700](){        [/color][color=#0000bb]hanghoa h1[/color][color=#007700]=new [/color][color=#0000bb]hanghoa[/color][color=#007700]();        [/color][color=#0000bb]hanghoa h2[/color][color=#007700]=new [/color][color=#0000bb]hanghoa[/color][color=#007700]();        [/color][color=#0000bb]hanghoa h3[/color][color=#007700]=new [/color][color=#0000bb]hanghoa[/color][color=#007700]();        [/color][color=#0000bb]hanghoa h4[/color][color=#007700]=new [/color][color=#0000bb]hanghoa[/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 sach mat hang:"[/color][color=#007700]);        [/color][color=#0000bb]h1[/color][color=#007700].[/color][color=#0000bb]tenhang[/color][color=#007700]=[/color][color=#dd0000]"kem danh rang"[/color][color=#007700];        [/color][color=#0000bb]h1[/color][color=#007700].[/color][color=#0000bb]mahang[/color][color=#007700]=[/color][color=#dd0000]"kdr123"[/color][color=#007700];        [/color][color=#0000bb]h1[/color][color=#007700].[/color][color=#0000bb]giahang[/color][color=#007700]=[/color][color=#0000bb]23000[/color][color=#007700];        [/color][color=#0000bb]h1[/color][color=#007700].[/color][color=#0000bb]soluong[/color][color=#007700]=[/color][color=#0000bb]20[/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]h1[/color][color=#007700].[/color][color=#0000bb]tenhang[/color][color=#007700]);        [/color][color=#0000bb]h2[/color][color=#007700].[/color][color=#0000bb]tenhang[/color][color=#007700]=[/color][color=#dd0000]"banh my"[/color][color=#007700];        [/color][color=#0000bb]h2[/color][color=#007700].[/color][color=#0000bb]mahang[/color][color=#007700]=[/color][color=#dd0000]"mb123"[/color][color=#007700];        [/color][color=#0000bb]h2[/color][color=#007700].[/color][color=#0000bb]giahang[/color][color=#007700]=[/color][color=#0000bb]5000[/color][color=#007700];        [/color][color=#0000bb]h2[/color][color=#007700].[/color][color=#0000bb]soluong[/color][color=#007700]=[/color][color=#0000bb]15[/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]h2[/color][color=#007700].[/color][color=#0000bb]tenhang[/color][color=#007700]);        [/color][color=#0000bb]h3[/color][color=#007700].[/color][color=#0000bb]tenhang[/color][color=#007700]=[/color][color=#dd0000]"my tom"[/color][color=#007700];        [/color][color=#0000bb]h3[/color][color=#007700].[/color][color=#0000bb]mahang[/color][color=#007700]=[/color][color=#dd0000]"mt123"[/color][color=#007700];        [/color][color=#0000bb]h3[/color][color=#007700].[/color][color=#0000bb]giahang[/color][color=#007700]=[/color][color=#0000bb]4500[/color][color=#007700];        [/color][color=#0000bb]h3[/color][color=#007700].[/color][color=#0000bb]soluong[/color][color=#007700]=[/color][color=#0000bb]50[/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]h3[/color][color=#007700].[/color][color=#0000bb]tenhang[/color][color=#007700]);        [/color][color=#0000bb]h4[/color][color=#007700].[/color][color=#0000bb]tenhang[/color][color=#007700]=[/color][color=#dd0000]"giay ve sinh"[/color][color=#007700];        [/color][color=#0000bb]h4[/color][color=#007700].[/color][color=#0000bb]mahang[/color][color=#007700]=[/color][color=#dd0000]"gvs123"[/color][color=#007700];        [/color][color=#0000bb]h4[/color][color=#007700].[/color][color=#0000bb]giahang[/color][color=#007700]=[/color][color=#0000bb]10000[/color][color=#007700];        [/color][color=#0000bb]h4[/color][color=#007700].[/color][color=#0000bb]soluong[/color][color=#007700]=[/color][color=#0000bb]30[/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]h4[/color][color=#007700].[/color][color=#0000bb]tenhang[/color][color=#007700]);    }    public [/color][color=#0000bb]float tinhtien1[/color][color=#007700]([/color][color=#0000bb]float gh[/color][color=#007700],[/color][color=#0000bb]int sl[/color][color=#007700]){        return [/color][color=#0000bb]gh[/color][color=#007700]*[/color][color=#0000bb]sl[/color][color=#007700];    }    public [/color][color=#0000bb]float tinhtien2[/color][color=#007700]([/color][color=#0000bb]float gh[/color][color=#007700],[/color][color=#0000bb]int sl[/color][color=#007700]){        return (float)([/color][color=#0000bb]gh[/color][color=#007700]*[/color][color=#0000bb]sl[/color][color=#007700]*[/color][color=#0000bb]0.95[/color][color=#007700]);    }    public [/color][color=#0000bb]void donhang[/color][color=#007700]([/color][color=#0000bb]string st[/color][color=#007700],[/color][color=#0000bb]float g[/color][color=#007700],[/color][color=#0000bb]float t[/color][color=#007700]){        [/color][color=#0000bb]hanghoa a[/color][color=#007700]=new [/color][color=#0000bb]hanghoa[/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]st[/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:"[/color][color=#007700]+[/color][color=#0000bb]g[/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]"    thanh tien:"[/color][color=#007700]+[/color][color=#0000bb]t[/color][color=#007700]);    }    public static [/color][color=#0000bb]void nhap[/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]"+mat hang ma ban muon mua:"[/color][color=#007700]);        [/color][color=#0000bb]string stt[/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].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"+so luong:"[/color][color=#007700]);        [/color][color=#0000bb]int sll[/color][color=#007700]=[/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextint[/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]"+time:"[/color][color=#007700]);        [/color][color=#0000bb]int time[/color][color=#007700]=[/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();        [/color][color=#0000bb]hanghoa a[/color][color=#007700]=new [/color][color=#0000bb]hanghoa[/color][color=#007700]();        if([/color][color=#0000bb]stt[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#dd0000]"kem danh rang"[/color][color=#007700])){            if([/color][color=#0000bb]time[/color][color=#007700]>=[/color][color=#0000bb]8[/color][color=#007700]&[/color][color=#0000bb]time[/color][color=#007700]<=[/color][color=#0000bb]17[/color][color=#007700])                [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"kdr123"[/color][color=#007700],[/color][color=#0000bb]23000[/color][color=#007700],[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tinhtien2[/color][color=#007700]([/color][color=#0000bb]23000[/color][color=#007700], [/color][color=#0000bb]sll[/color][color=#007700]));            else                [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"kdr123"[/color][color=#007700],[/color][color=#0000bb]23000[/color][color=#007700],[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tinhtien2[/color][color=#007700]([/color][color=#0000bb]23000[/color][color=#007700], [/color][color=#0000bb]sll[/color][color=#007700]));        }        if([/color][color=#0000bb]stt[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#dd0000]"banh my"[/color][color=#007700])){            if([/color][color=#0000bb]time[/color][color=#007700]>=[/color][color=#0000bb]8[/color][color=#007700]&[/color][color=#0000bb]time[/color][color=#007700]<=[/color][color=#0000bb]17[/color][color=#007700])                [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"bm123"[/color][color=#007700],[/color][color=#0000bb]5000[/color][color=#007700],[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tinhtien2[/color][color=#007700]([/color][color=#0000bb]5000[/color][color=#007700], [/color][color=#0000bb]sll[/color][color=#007700]));            else                [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"kdr123"[/color][color=#007700],[/color][color=#0000bb]5000[/color][color=#007700],[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tinhtien2[/color][color=#007700]([/color][color=#0000bb]5000[/color][color=#007700], [/color][color=#0000bb]sll[/color][color=#007700]));        }        if([/color][color=#0000bb]stt[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#dd0000]"my tom"[/color][color=#007700])){            if([/color][color=#0000bb]time[/color][color=#007700]>=[/color][color=#0000bb]8[/color][color=#007700]&[/color][color=#0000bb]time[/color][color=#007700]<=[/color][color=#0000bb]17[/color][color=#007700])                [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"mt123"[/color][color=#007700],[/color][color=#0000bb]4500[/color][color=#007700],[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tinhtien2[/color][color=#007700]([/color][color=#0000bb]4500[/color][color=#007700], [/color][color=#0000bb]sll[/color][color=#007700]));            else                [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"mt123"[/color][color=#007700],[/color][color=#0000bb]4500[/color][color=#007700],[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tinhtien2[/color][color=#007700]([/color][color=#0000bb]4500[/color][color=#007700], [/color][color=#0000bb]sll[/color][color=#007700]));        }        if([/color][color=#0000bb]stt[/color][color=#007700].[/color][color=#0000bb]equals[/color][color=#007700]([/color][color=#dd0000]"giay ve sinh"[/color][color=#007700])){            if([/color][color=#0000bb]time[/color][color=#007700]>=[/color][color=#0000bb]8[/color][color=#007700]&[/color][color=#0000bb]time[/color][color=#007700]<=[/color][color=#0000bb]17[/color][color=#007700])                [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"gvs123"[/color][color=#007700],[/color][color=#0000bb]10000[/color][color=#007700],[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tinhtien2[/color][color=#007700]([/color][color=#0000bb]10000[/color][color=#007700], [/color][color=#0000bb]sll[/color][color=#007700]));            else                [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]donhang[/color][color=#007700]([/color][color=#dd0000]"gvs123"[/color][color=#007700],[/color][color=#0000bb]10000[/color][color=#007700],[/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tinhtien2[/color][color=#007700]([/color][color=#0000bb]10000[/color][color=#007700], [/color][color=#0000bb]sll[/color][color=#007700]));        }    }}public class [/color][color=#0000bb]classhanghoa [/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]hanghoa a[/color][color=#007700]=new [/color][color=#0000bb]hanghoa[/color][color=#007700]();        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]danhsachmathang[/color][color=#007700]();        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]nhap[/color][color=#007700]();    }}[/color] 

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[toyensaodlm]

mong mọi người chỉ bảo thêm !
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/*
* 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 exam14;
 
import java.text.dateformat;
import java.text.simpledateformat;
import java.util.date;
import java.util.scanner;
 
/**
*
* @author le
*/
class hoadon {
    public string namegoods;
    public string idgoods;
    public int pricegoods;
    public int number;
    public int totalmoney(float time){
        int total = 0;
        if(time >=8||time <= 17){
            total = (pricegoods*number - pricegoods*number*5/100);
        }
        if(time <8||time>17){
            total =  pricegoods*number;
        }
        return total;
    }
    public void input(){
        scanner input = new scanner(system.in);
        system.out.print(" + namegoods:");
        namegoods = input.nextline();
        system.out.print(" + idgoods:");
        idgoods = input.nextline();
        system.out.print(" + pricegoods:");
        pricegoods = input.nextint();
        system.out.println(" + numbersgoods:");
        number = input.nextint();
    }
    public void show(){
        date date = new date();
        system.out.println(" + name goods :"+namegoods);
        system.out.println(" + id goods: "+idgoods);
        system.out.println(" + price goods: "+pricegoods);
        system.out.println(" + number goods: "+number);
        system.out.println(" + total money: "+totalmoney(date.gethours()));
        dateformat dateformat = new simpledateformat("hh:mm:ss dd/mm/yyyy");
        string hienthingayban = dateformat.format(date);
        system.out.println(" + date sell: "+date);
    }         
}
public class goodsmanager{
    public static void main(string[] args){
        hoadon a = new hoadon();
        system.out.println(" *** nhap thong tin hang vua ban ***");
        a.input();
        system.out.println(" *** hien thi thong tin don hang ***");
        a.show();
    }
}

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[hoanghoa_986]

ủa mọi người ! đề bài đâu có biến thời gian mua ! o_o

[tovitluc2014]

em nộp bài, nhờ mọi người xem và góp ý với cách làm của em

class hh{
    public string tenhang, mahang;
    public int soluong, dongia,time;
    public double tinhtt(){
        double tt=0.0;
        if((time >= 8)&&(time <= 17)) tt = soluong*dongia*0.95;
        else tt= soluong*dongia;
        return tt;
    }
    public void nhaptt(){
        scanner input = new scanner(system.in);
        system.out.println("nhap du lieu:");
        system.out.println("nhap ma hang:");
        mahang = input.nextline();
        system.out.println("nhap ten hang:");
        tenhang = input.nextline();
        system.out.println("nhap so luong:");
        soluong = input.nextint();
        system.out.println("nhap don gia:");
        dongia = input.nextint();
        do{
        system.out.println("nhap thoi gian mua hang tu 0 den 24:");
        time = input.nextint();
        }while(time<0&&time>24);
    }
    public void intt(){
        system.out.println("thong tin mua hang:");
        system.out.println("ma hang:"+mahang);
        system.out.println("ten hang:"+tenhang);
        system.out.println("so luong:"+soluong);
        system.out.println("don gia:"+dongia);
        system.out.println("thoi gian mua hang:"+time);
    }
}
public class bai1 {
    public static void main(string[] args) {
        hh hd1 = new hh();
        hd1.nhaptt();
        hd1.intt();
        system.out.println("tong so tien khach phai tra:"+hd1.tinhtt());
    }
 
}

[hienrut0510]

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[color=#000000]
package main[/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];class [/color][color=#0000bb]hanghoa[/color][color=#007700]{public [/color][color=#0000bb]string tenhang[/color][color=#007700], [/color][color=#0000bb]mahang[/color][color=#007700];public [/color][color=#0000bb]float giahang[/color][color=#007700], [/color][color=#0000bb]time[/color][color=#007700], [/color][color=#0000bb]tongtien[/color][color=#007700];public [/color][color=#0000bb]int soluong[/color][color=#007700];public [/color][color=#0000bb]void tinhs[/color][color=#007700](){        if([/color][color=#0000bb]time[/color][color=#007700]>=[/color][color=#0000bb]8 [/color][color=#007700]&& [/color][color=#0000bb]time[/color][color=#007700]<=[/color][color=#0000bb]17[/color][color=#007700]){            [/color][color=#0000bb]giahang [/color][color=#007700]=([/color][color=#0000bb]giahang[/color][color=#007700]*[/color][color=#0000bb]95[/color][color=#007700]/[/color][color=#0000bb]100[/color][color=#007700]);        }        [/color][color=#0000bb]tongtien[/color][color=#007700]=[/color][color=#0000bb]giahang[/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 thanh toan: "[/color][color=#007700]+[/color][color=#0000bb]tongtien[/color][color=#007700]);}public [/color][color=#0000bb]void hoadon[/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]"ten hang: "[/color][color=#007700]);[/color][color=#0000bb]tenhang [/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].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"ma hang: "[/color][color=#007700]);[/color][color=#0000bb]mahang [/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].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"gia hang: "[/color][color=#007700]);[/color][color=#0000bb]giahang [/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].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"thoi gian: "[/color][color=#007700]);[/color][color=#0000bb]time [/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].[/color][color=#0000bb]println[/color][color=#007700]([/color][color=#dd0000]"so luong: "[/color][color=#007700]);[/color][color=#0000bb]soluong [/color][color=#007700]= [/color][color=#0000bb]input[/color][color=#007700].[/color][color=#0000bb]nextint[/color][color=#007700]();}public [/color][color=#0000bb]void showhoadon[/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 hoa don: "[/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]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]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 hang: "[/color][color=#007700]+[/color][color=#0000bb]giahang[/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]"thoi gian: "[/color][color=#007700]+[/color][color=#0000bb]time[/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]soluong[/color][color=#007700]);}}public class [/color][color=#0000bb]goods [/color][color=#007700]{public static [/color][color=#0000bb]void main[/color][color=#007700]([/color][color=#0000bb]string[/color][color=#007700][] [/color][color=#0000bb]agrs[/color][color=#007700]){[/color][color=#0000bb]hanghoa hh [/color][color=#007700]= new [/color][color=#0000bb]hanghoa[/color][color=#007700]();[/color][color=#0000bb]hh[/color][color=#007700].[/color][color=#0000bb]hoadon[/color][color=#007700]();[/color][color=#0000bb]hh[/color][color=#007700].[/color][color=#0000bb]showhoadon[/color][color=#007700]();[/color][color=#0000bb]hh[/color][color=#007700].[/color][color=#0000bb]tinhs[/color][color=#007700](); }    }[/color] 

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[ADVQFHCW3521]

xem giup minh voi nha
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[color=#000000]
   package quanlibanhang[/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];class [/color][color=#0000bb]hanghoa[/color][color=#007700]{    public [/color][color=#0000bb]string tenhang[/color][color=#007700], [/color][color=#0000bb]mahang[/color][color=#007700];    public [/color][color=#0000bb]float giahang[/color][color=#007700], [/color][color=#0000bb]soluong[/color][color=#007700], [/color][color=#0000bb]thoigian[/color][color=#007700];    public [/color][color=#0000bb]float giamgia[/color][color=#007700]([/color][color=#0000bb]float thoigian[/color][color=#007700], [/color][color=#0000bb]float giahang[/color][color=#007700]){        if([/color][color=#0000bb]thoigian [/color][color=#007700]>= [/color][color=#0000bb]8 [/color][color=#007700]&& [/color][color=#0000bb]thoigian [/color][color=#007700]<= [/color][color=#0000bb]17[/color][color=#007700]){            return (float) ([/color][color=#0000bb]giahang [/color][color=#007700]* [/color][color=#0000bb]95 [/color][color=#007700]/ [/color][color=#0000bb]100[/color][color=#007700]);        }        return (float) ([/color][color=#0000bb]giahang[/color][color=#007700]);    }    public [/color][color=#0000bb]float tongtien[/color][color=#007700]([/color][color=#0000bb]float giahang[/color][color=#007700], [/color][color=#0000bb]float soluong[/color][color=#007700]){        return ([/color][color=#0000bb]giahang [/color][color=#007700]* [/color][color=#0000bb]soluong[/color][color=#007700]);    }    }        public class [/color][color=#0000bb]quanlibanhang [/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 nhap [/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]hanghoa a [/color][color=#007700]= new [/color][color=#0000bb]hanghoa[/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]"nhap ten hang: "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tenhang [/color][color=#007700]= [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextline[/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]"nhap ma hang: "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]mahang [/color][color=#007700]= [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextline[/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]"nhap gia ban (nghin dong): "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]giahang [/color][color=#007700]= [/color][color=#0000bb]nhap[/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]"nhap so luong: "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]soluong [/color][color=#007700]= [/color][color=#0000bb]nhap[/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]"nhap thoi gian ban hang: "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]thoigian [/color][color=#007700]= [/color][color=#0000bb]nhap[/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:"[/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]a[/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]a[/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]a[/color][color=#007700].[/color][color=#0000bb]giahang[/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]a[/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]"thoi gian mua: " [/color][color=#007700]+ [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]thoigian [/color][color=#007700]+ [/color][color=#dd0000]"gio"[/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 ban hang: " [/color][color=#007700]+ [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tongtien[/color][color=#007700]([/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]giamgia[/color][color=#007700]([/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]giahang[/color][color=#007700], [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]thoigian[/color][color=#007700]), [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]soluong[/color][color=#007700]) + [/color][color=#dd0000]"nghin dong"[/color][color=#007700]);    }    }[/color] 

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[hoanghoang33888]

bạn ơi sao mình không in ra được tổng tiền lúc không giảm giá được vậy, cứ lệch ra 8h với 17h là nó in ra đơn giá chứ không có in ra tổng tiền .

@caoboi_92 : bài đúng mà bạn mình thấy in bình thường mà

[duongnhibds]

xem giup minh voi nha
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[color=#000000]
   package quanlibanhang[/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];class [/color][color=#0000bb]hanghoa[/color][color=#007700]{    public [/color][color=#0000bb]string tenhang[/color][color=#007700], [/color][color=#0000bb]mahang[/color][color=#007700];    public [/color][color=#0000bb]float giahang[/color][color=#007700], [/color][color=#0000bb]soluong[/color][color=#007700], [/color][color=#0000bb]thoigian[/color][color=#007700];    public [/color][color=#0000bb]float giamgia[/color][color=#007700]([/color][color=#0000bb]float thoigian[/color][color=#007700], [/color][color=#0000bb]float giahang[/color][color=#007700]){        if([/color][color=#0000bb]thoigian [/color][color=#007700]>= [/color][color=#0000bb]8 [/color][color=#007700]&& [/color][color=#0000bb]thoigian [/color][color=#007700]<= [/color][color=#0000bb]17[/color][color=#007700]){            return (float) ([/color][color=#0000bb]giahang [/color][color=#007700]* [/color][color=#0000bb]95 [/color][color=#007700]/ [/color][color=#0000bb]100[/color][color=#007700]);        }        return (float) ([/color][color=#0000bb]giahang[/color][color=#007700]);    }    public [/color][color=#0000bb]float tongtien[/color][color=#007700]([/color][color=#0000bb]float giahang[/color][color=#007700], [/color][color=#0000bb]float soluong[/color][color=#007700]){        return ([/color][color=#0000bb]giahang [/color][color=#007700]* [/color][color=#0000bb]soluong[/color][color=#007700]);    }   }        public class [/color][color=#0000bb]quanlibanhang [/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 nhap [/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]hanghoa a [/color][color=#007700]= new [/color][color=#0000bb]hanghoa[/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]"nhap ten hang: "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tenhang [/color][color=#007700]= [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextline[/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]"nhap ma hang: "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]mahang [/color][color=#007700]= [/color][color=#0000bb]nhap[/color][color=#007700].[/color][color=#0000bb]nextline[/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]"nhap gia ban (nghin dong): "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]giahang [/color][color=#007700]= [/color][color=#0000bb]nhap[/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]"nhap so luong: "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]soluong [/color][color=#007700]= [/color][color=#0000bb]nhap[/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]"nhap thoi gian ban hang: "[/color][color=#007700]);        [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]thoigian [/color][color=#007700]= [/color][color=#0000bb]nhap[/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:"[/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]a[/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]a[/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]a[/color][color=#007700].[/color][color=#0000bb]giahang[/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]a[/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]"thoi gian mua: " [/color][color=#007700]+ [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]thoigian [/color][color=#007700]+ [/color][color=#dd0000]"gio"[/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 ban hang: " [/color][color=#007700]+ [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]tongtien[/color][color=#007700]([/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]giamgia[/color][color=#007700]([/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]giahang[/color][color=#007700], [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]thoigian[/color][color=#007700]), [/color][color=#0000bb]a[/color][color=#007700].[/color][color=#0000bb]soluong[/color][color=#007700]) + [/color][color=#dd0000]"nghin dong"[/color][color=#007700]);    }   }[/color] 

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@hell3380: bạn xem lại dòng cuối cùng của hàm main nhé, bạn sai vị trí của 2 thông số trong phương thức giảm giá rùi