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免費java超市代碼 java水果超市代碼如何講解

java超市計價系統代碼

package?entity;

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public?class?Market?{

private?int?id;//id

private?int?num;//數量

private?String?goods;//商品

private?double?price;//價格

public?Market(int?id,?int?num,?String?goods,?double?price)?{

super();

this.id?=?id;

this.num?=?num;

this.goods?=?goods;

this.price?=?price;

}

public?int?getId()?{

return?id;

}

public?void?setId(int?id)?{

this.id?=?id;

}

public?int?getNum()?{

return?num;

}

public?void?setNum(int?num)?{

this.num?=?num;

}

public?String?getGoods()?{

return?goods;

}

public?void?setGoods(String?goods)?{

this.goods?=?goods;

}

public?double?getPrice()?{

return?price;

}

public?void?setPrice(double?price)?{

this.price?=?price;

}

public?double?calc(?){

double?sum=price*num;

System.out.println("您消費共計:"+sum+"¥");

return?sum;

}

}

package?test;

import?java.util.HashMap;

import?java.util.Map;

import?java.util.Scanner;

import?entity.Market;

public?class?Test?{

private?static?MapInteger,Market?goods=new?HashMapInteger,?Market();

public?static?void?main(String[]?args)?{

System.out.println("-------超市計價系統-------");

String?goods1="可口可樂";

String?goods2="爆米花";

String?goods3="益達";

printTable("編號","商品","價格");

printTable("1",goods1,"3.0¥");

printTable("2",goods2,"5.0¥");

printTable("3",goods3,"10.0¥");

goods.put(1,?new?Market(1,?1,?goods1,?3.0));

goods.put(2,?new?Market(2,?1,??goods2,?5.0));

goods.put(3,?new?Market(3,?1,?goods3,?10.0));

Scanner?input?=?new?Scanner(System.in);

System.out.println("請輸入商品的編號:");

int?num?=?input.nextInt();

System.out.println("請輸入商品的數量");

int?amount?=?input.nextInt();

Market?market?=?goods.get(num);

market.setNum(amount);

market.calc();

}

private?static?void?printTable(String?row1,String?row2,String?row3?)?{

System.out.print(row1);

int?times=12;

if?(row2!="商品")?{

times=5;

}

for?(int?i?=?0;?i??times;?i++)?{

System.out.print("?");

}

System.out.print(row2);

for?(int?i?=?0;?i??10;?i++)?{

System.out.print("?");

}

System.out.print(row3);

System.out.println("\n");

}

}

//測試結果:

-------超市計價系統-------

編號????????????商品??????????價格

1?????可口可樂??????????3.0¥

2?????爆米花??????????5.0¥

3?????益達??????????10.0¥

請輸入商品的編號:

3

請輸入商品的數量

5

您消費共計:50.0¥

求Java超市管理系統代碼(急)

那很簡單啊,界面用dreamweaver直接做就行 ,代碼就是JAVA訪問數據庫,就那幾行

跪求一個小型超市管理系統,用java編寫的,急~ 只要源代碼。。可以發我郵箱

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class Conn {

private static final String driver="com.mysql.jdbc.Driver";

private static final String url="jdbc:mysql://localhost:3306/blog?user=rootpassword=root";

//獲得數據庫連接

public static Connection getConnection(){

Connection conn = null;

try {

Class.forName(driver);

conn = DriverManager.getConnection(url);

if(conn != null){

System.out.print("成功");

}

} catch (SQLException e) {

e.printStackTrace();

} catch (ClassNotFoundException e) {

e.printStackTrace();

}

return conn;

}

//關閉Resultset

public static void closeResultSet(ResultSet rs)

{

try

{

if(rs != null)

{

rs.close();

}

}catch (SQLException ex)

{

ex.printStackTrace();

}

}

//關閉Statement

public static void closeStatement(Statement st)

{

try

{

if(st != null)

{

st.close();

}

}catch (SQLException ex)

{

ex.printStackTrace();

}

}

//關閉Connection

public static void closeConnection(Connection conn)

{

try

{

if(conn != null)

{

conn.close();

}

}catch (SQLException ex)

{

ex.printStackTrace();

}

}

//測試數據庫連接是否成功

public static void main(String[] args) {

Conn.getConnection();

}

}

Java編程,簡單超市系統!!跪求啊

import java.util.Vector; class Supermarket{ Vector market = null; Supermarket(){ market = new Vector(); } public void append(Goods g){ market.addElement(g); } public void delete(Goods g){ market.removeElement(g); } public void query(Goods g){ for(int i = 0;imarket.size();i++){ if((market.elementAt(i)).equals(g) == true){ g.showMe(); } } } } class Goods{ private String name; private double price; private int num; public Goods(String name,double price,int num){ this.name=name; this.price = price; this.num = num; } public void sale(double buyprice){ if(num==0){ System.out.println("購買商品已售空"); return; } if(buypricethis.price){ System.out.println("余額不足"); }else{ num--; } } public void add(int quantity){ num+=quantity; } public void showMe(){ System.out.println("商品名稱:"+this.name+" 商品價格:"+this.price+"$ "+"商品個數:"+this.num); } } //很多地方給的不是很詳細,只能這么憑理解寫,測試main方法自己寫。

文章標題:免費java超市代碼 java水果超市代碼如何講解
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