交通灯

Question

有没有写过这个Java程序的，拿出来分享一下

Answer 1

http://hi.baidu.com/yanhe0116/blog/item/696bc23de1c824ce9f3d6216.html三个程序。 1. count.java   2.trafficlight.java   3. trafficlightPanel.java1. count.java//******************************************************************************
// count.java                                   
//
//计算获得的两个的和与乘积
//******************************************************************************
import javax.swing.JOptionPane;class count
{
//----------------------------------------------------------
// 创建对话框
//----------------------------------------------------------
public static void main(String[] args)
{
   String numStr1,numStr2,result;
   int num1,num2,again,a,b;
   do
   {
    numStr1=JOptionPane.showInputDialog("Enter a num:");
    num1=Integer.parseInt(numStr1);
   
    numStr2=JOptionPane.showInputDialog("Enter a num:");
    num2=Integer.parseInt(numStr2);
   
    a=num1+num2;  
            b=num1*num2;
           
            result="输入的数："+num1+","+num2+"\n和:" +a +"\n积:"+b;
            JOptionPane.showMessageDialog(null,result);
            again=JOptionPane.showConfirmDialog(null,"继续？");
        }
        while(again==JOptionPane.YES_OPTION);
    }}2. trafficlight.java//******************************************************************************
// trafficlight.java                     
//
// 画出交通灯并用按钮改变灯的颜色
//******************************************************************************
import javax.swing.*;
import java.awt.*;class trafficlight
{
//-------------------------------------------------------------------
//创建面板
//-------------------------------------------------------------------
public static void main(String[] args)
{
   JFrame frame=new JFrame("Trafficlight");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.getContentPane().add(new trafficlightPanel());
   frame.pack();
   frame.setVisible(true);
}
}3. trafficlightPanel.java//******************************************************************************
// trafficlight.java                    
//
// 画出交通灯并用按钮改变灯的颜色
//******************************************************************************
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;class trafficlightPanel extends JPanel
{
    final int BASEX=200;
final int BASEY=50;
private JButton change;
private JPanel buttonPanel;
private JLabel label;
private int count=3;
//---------------------------------------------------------------
//GUI编程
//---------------------------------------------------------------
public trafficlightPanel()
{   setBackground(Color.cyan);
   setPreferredSize(new Dimension(900,600));
  
   change=new JButton("change");
   ButtonListener listener=new ButtonListener();
   change.addActionListener(listener);
  
   buttonPanel=new JPanel();
   buttonPanel.setPreferredSize(new Dimension(100,50));
   buttonPanel.setBackground(Color.blue);
   buttonPanel.add(change);
  
     add(buttonPanel);
    }
//----------------------------------------------------------------
//画图并加颜色
//----------------------------------------------------------------
public void paintComponent(Graphics page)
{
   super.paintComponent(page);
  
   if(count%3==0)
        {
        page.setColor(Color.lightGray);
         page.fillOval(BASEX-98,BASEY+35,250,80);
         page.fillRect(BASEX+15,BASEY+110,30,350);
         page.fillRect(BASEX-160,BASEY+450,400,10);
        
        page.setColor(Color.red);
         page.fillOval(BASEX-60,BASEY+50,50,50);
        page.setColor(Color.gray);
         page.fillOval(BASEX,BASEY+50,50,50);
         page.fillOval(BASEX+60,BASEY+50,50,50);
     }
    
     if(count%3==1)
     {
         page.setColor(Color.lightGray);
         page.fillOval(BASEX-98,BASEY+35,250,80);
         page.fillRect(BASEX+15,BASEY+110,30,350);
         page.fillRect(BASEX-160,BASEY+450,400,10);
        
         page.setColor(Color.green);
         page.fillOval(BASEX,BASEY+50,50,50);
         page.setColor(Color.gray);
         page.fillOval(BASEX-60,BASEY+50,50,50);
         page.fillOval(BASEX+60,BASEY+50,50,50);
     }
    
     if(count%3==2)
     {
         page.setColor(Color.lightGray);
         page.fillOval(BASEX-98,BASEY+35,250,80);
         page.fillRect(BASEX+15,BASEY+110,30,350);
         page.fillRect(BASEX-160,BASEY+450,400,10);
        
         page.setColor(Color.yellow);
         page.fillOval(BASEX+60,BASEY+50,50,50);
         page.setColor(Color.gray);
         page.fillOval(BASEX,BASEY+50,50,50);
         page.fillOval(BASEX-60,BASEY+50,50,50);
        }
}
//--------------------------------------------------------------
//监听
//--------------------------------------------------------------
    private class ButtonListener implements ActionListener
{
   public void actionPerformed(ActionEvent event)
   {
    count++;
    repaint();
   
   }
}
}