import java.awt.*;
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import java.awt.event.*;
class ShopFrame extends Frame implements ActionListener
{ Label label1,label2,label3,label4;
Button button1,button2,button3,button4,button5;
TextArea text;
Panel panel1,panel2;
static float sum=0.0f;
ShopFrame(String s)
{ super(s);
setLayout(new BorderLayout());
label1=new Label("面纸:3元",Label.LEFT);
label2=new Label("钢笔:5元",Label.LEFT);
label3=new Label("书:10元",Label.LEFT);
label4=new Label("袜子:8元",Label.LEFT);
button1=new Button("加入购物车");
button2=new Button("加入购物车");
button3=new Button("加入购物车");
button4=new Button("加入购物车");
button5=new Button("查看购物车");
text=new TextArea("商品有:"+"\n",5,10);
text.setEditable(false);
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{ System.exit(0);
}
}
);
button1.addActionListener(this);
button2.addActionListener(this);
button3.addActionListener(this);
button4.addActionListener(this);
button5.addActionListener(this);
panel1=new Panel();
panel2=new Panel();
panel1.add(label1);
panel1.add(button1);
panel1.add(label2);
panel1.add(button2);
panel1.add(label3);
panel1.add(button3);
panel1.add(label4);
panel1.add(button4);
panel2.setLayout(new BorderLayout());
panel2.add(button5,BorderLayout.NORTH);
panel2.add(text,BorderLayout.SOUTH);
this.add(panel1,BorderLayout.CENTER);
this.add(panel2,BorderLayout.SOUTH);
setBounds(100,100,350,250);
setVisible(true);
validate();
}
public void actionPerformed(ActionEvent e)
{ if(e.getSource()==button1)
{ text.append("一个面纸、");
sum=sum+3;
}
else if(e.getSource()==button2)
{ text.append("一只钢笔、");
sum=sum+5;
}
else if(e.getSource()==button3)
{ text.append("一本书、");
sum=sum+10;
}
else if(e.getSource()==button4)
{ text.append("一双袜子、");
sum=sum+8;
}
else if(e.getSource()==button5)
{
text.append("\n"+"总价为:"+"\n"+sum);
}
}
}
public class Shopping {
public static void main(String[] args) {
new ShopFrame("购物车");
}
}
我没用Swing可能显示不出来你的效果。不满意得话我在给你编一个。
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;public class ShoppingCartManager {
HashMapString, String hm=new HashMapString, String();
float totlePrice=0;
//添加book到购物车
public void addBook(String bookId,String bookQuantity){
if(hm.containsKey(bookId)){
int value=Integer.parseInt(hm.get(bookId));
value+=Integer.parseInt(bookQuantity);
hm.put(bookId, value+"");
}else{
hm.put(bookId, bookQuantity);
}
}
//修改数量
public void updateQuantity(String bookId,String bookQuantity){
hm.put(bookId, bookQuantity);
}
//获取购物车的所有信息 并计算总价
public ArrayListBookBean getShoppingCart(){
ArrayListBookBean al=new ArrayListBookBean();
IteratorString i=hm.keySet().iterator();
String ids="";
BookTableManager btm=new BookTableManager();
while(i.hasNext()){
ids=ids+","+i.next();
}
al= btm.selectByBookIds(ids);
totlePrice=0; //清空总价，防止无限累计
for(int j=0;jal.size();j++){
BookBean bb=al.get(j);
totlePrice+=bb.getPrice()*Integer.parseInt(getQuantityById(bb.getBookId()+""));
}
return al;
}
//获取总价
public float getTotlePrice(){
return totlePrice;
}
//根据ID获取数量
public String getQuantityById(String id){
String quantity=hm.get(id);
return quantity;
}
//清空购物车
public void clear(){
hm.clear();
}
//删除购物车中的一本书
public void deleteById(String id){
hm.remove(id);
}
}
package Test;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
init();//初始化
MapString,String map = new LinkedHashMap();
while(true){
Scanner in= new Scanner(System.in);
map = buy(in,map);//选择
System.out.println();
System.out.println("还要继续购物吗?(Y/N)");
String jx = in.nextLine();
if(jx.equals("N")){
break;
}
}
print(map);
}
public static void print(MapString, String m){
System.out.println("\n\n\n******************");
System.out.println(" 购物车清单");
Integer hj = 0;
for (EntryString, String entry : m.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
if(key.equals("1")){
hj += Integer.parseInt(value)*3;
System.out.println("哇哈哈纯净水: "+value+"件，合计：￥"+Integer.parseInt(value)*3);
}else if(key.equals("2")){
hj += Integer.parseInt(value)*5;
System.out.println("康师傅方便面: "+value+"件，合计：￥"+Integer.parseInt(value)*5);
}else if(key.equals("3")){
hj += Integer.parseInt(value)*4;
System.out.println("可口可乐: "+value+"件，合计：￥"+Integer.parseInt(value)*4);
}
}
System.out.println("合计金额:￥"+hj);
}
public static void init(){
System.out.println("******************");
System.out.println("\t商品列表\n");
System.out.println(" 商品名称 价格");
System.out.println("1. 哇哈哈纯净水 ￥3");
System.out.println("2. 康师傅方便面 ￥5");
System.out.println("3. 可口可乐 ￥4");
System.out.println("******************");
}
public static MapString,String buy(Scanner scan,MapString,String m){
System.out.print("请输入编号:");
String bh = scan.nextLine();
System.out.print("请输入购买数量:");
String num = scan.nextLine();
if(m.size()0 m.keySet().contains(bh)){
m.put(bh,(Integer.parseInt(bh)+Integer.parseInt(num))+"");
}else{
m.put(bh, num);
}
return m;
}
}