Java开发网 - 关于上次的问题!!

Topic: 关于上次的问题!!

1.关于上次的问题!!

Posted by: dalor_cheng
Posted on: 2005-12-27 09:37

我上次问的问题没有一个人回答,我很失望,现在我完成了.
不要小看我
还有上次那位向我要Money的那位老兄,你的眼里只有钱,无耻!!!!

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Shopping implements ItemListener,ActionListener
{ JCheckBox cb1,cb2,cb3;
JRadioButton rb1,rb2;
ButtonGroup group=new ButtonGroup();
JLabel lbl;
JButton btn;
int cost,totalCost;
double discount =0.9;

public static void main(String args[])
{ ImageIcon icon=new ImageIcon("3.jpg");
JFrame frame=new JFrame("123网上购物");
Shopping app=new Shopping();
JPanel pane=app.createComponents();
frame.getContentPane().add(pane);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(350,200);
frame.setVisible(true);
frame.setIconImage(icon.getImage());
}
public JPanel createComponents()
{ JPanel mainpane=new JPanel();
JPanel paneC=new JPanel();
JPanel paneR=new JPanel();
paneC.setLayout(new BoxLayout(paneC,BoxLayout.PAGE_AXIS));
paneR.setLayout(new BoxLayout(paneR,BoxLayout.PAGE_AXIS));
btn=new JButton("购买");
lbl=new JLabel("总金额: 0 $ ");
mainpane.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
//paneC.setBorder(BorderFactory.createCompoundBorder(BorderFactory.createTitleBorder("产品价格"),BorderFactory.createEmptyBorder(5,5,5,5)));//30
//paneR.setBorder(BorderFactory.createCompoundBorder(BorderFactory.createTitleBorder("会员优费"),BorderFactory.createEmptyBorder(5,5,5,5)));

cb1=new JCheckBox("复印机(4688)",false);
cb1.addItemListener(this);
paneC.add(cb1);
cb2=new JCheckBox("复印机(8898)",false);
cb2.addItemListener(this);
paneC.add(cb2);
cb3=new JCheckBox("复印机(2780)",false);
cb3.addItemListener(this);
paneC.add(cb3);

rb1=new JRadioButton("VIP会员(10%)");
rb1.addActionListener(this);
rb1.setSelected(true);
paneR.add(rb1);
rb2=new JRadioButton("普通会员(2%)");
rb2.addActionListener(this);
btn.addActionListener(this);
paneR.add(rb2);
group.add(rb1);
group.add(rb2);
mainpane.add(paneC);
mainpane.add(paneR);
mainpane.add(lbl);
mainpane.add(btn);
return mainpane;
}
public void itemStateChanged(ItemEvent e)
{ JCheckBox cb=(JCheckBox)e.getItem();
if(cb==cb1)
if(e.getStateChange()==ItemEvent.SELECTED)
cost+=4688;
else
cost-=4688;
if(cb==cb2)
if(e.getStateChange()==ItemEvent.SELECTED)
cost+=8898;
else
cost-=8898;
if(cb==cb3)
if(e.getStateChange()==ItemEvent.SELECTED)
cost+=2780;
else
cost-=2780;
totalCost=(int)(cost*discount);
lbl.setText("总金额:"+totalCost);
}
public void actionPerformed(ActionEvent e)
{ if(e.getSource()==btn)
lbl.setText("感谢你的购买!");
else if(e.getSource()==rb1)
{ discount=0.9;
totalCost=(int)(cost*discount);
lbl.setText("总金额:"+totalCost);
}
else
{ discount=0.98;
totalCost=(int)(cost*discount);
lbl.setText("总金额:"+totalCost);
}
}
}