java红绿灯代码 java实现红绿灯( 二 )

完整的程序如下：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.Graphics;
public class TrafficLight extends JFrame{
JRadioButton jrbYellow,jrbGreen,jrbRed;
int flag=0;
jpNewPaneljpNewPanel;
public static void main(String[] args){
TrafficLight frame=new TrafficLight();
frame.setSize(500,200);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("TrafficLight");
【java红绿灯代码 java实现红绿灯】frame.setVisible(true);
}
public TrafficLight(){
jpNewPanel=new jpNewPanel();
add(jpNewPanel,BorderLayout.CENTER);
JPanel jpRadioButtons=new JPanel();
jpRadioButtons.setLayout(new GridLayout(1,3));
jpRadioButtons.add(jrbYellow=new JRadioButton("Yellow"));
jpRadioButtons.add(jrbGreen=new JRadioButton("Green"));
jpRadioButtons.add(jrbRed=new JRadioButton("Red"));
add(jpRadioButtons,BorderLayout.SOUTH);
ButtonGroup group=new ButtonGroup();
group.add(jrbYellow);
group.add(jrbGreen);
group.add(jrbRed);
jrbYellow.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
flag=2;
jpNewPanel.repaint();
}
});
jrbGreen.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
flag=1;
jpNewPanel.repaint();
}
});
jrbRed.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
flag=3;
jpNewPanel.repaint();
}
});
}
class jpNewPanel extends JPanel{
protected void paintComponent(Graphics g){
super.paintComponent(g);
g.drawRect(0,0,40,100);
g.drawOval(10,10,20,20);
g.drawOval(10,40,20,20);
g.drawOval(10,70,20,20);
if(flag==1){
g.setColor(Color.GREEN);
g.fillOval(10, 70, 20, 20);
}
else if(flag==2){
g.setColor(Color.YELLOW);
g.fillOval(10, 40, 20, 20);
}
else if(flag==3){
g.setColor(Color.RED);
g.fillOval(10, 10, 20, 20);
}
}
}
}
求Java大神帮我看一下这个红绿灯的代码，很短楼主，怎么说你呢？粗心把
仔细看看是不是类中有类，把那个窗口类放到外面~~
还有，貌似你的制图也是有问题的~~~
java 线程实现一个红绿灯问题关键是启动一个线程控制颜色。代码如下。
import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
public class Signal extends Applet {
int width = 200, height = 240;
int w = 50, h = 50;
int x = (width - w) / 2, y1 = (height - h * 3) / 3, y2 = y1 + h, y3 = y2 + h;
Color c = Color.RED;
@Override
public void init() {
ScheduledExecutorService exec = Executors.newScheduledThreadPool(1);
exec.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
if (c == Color.RED) {
c = Color.YELLOW;
} else if (c == Color.YELLOW) {
c = Color.GREEN;
} else if (c == Color.GREEN) {
c = Color.RED;
}
repaint();
}
}, 5, 5, TimeUnit.SECONDS);
}
@Override
public void paint(Graphics g) {
setBackground(Color.white);
// all gray
g.setColor(Color.LIGHT_GRAY);
g.fillOval(x, y1, w, h);
g.fillOval(x, y2, w, h);
g.fillOval(x, y3, w, h);
if (c == Color.RED) {
g.setColor(Color.RED);
g.fillOval(x, y1, w, h);
} else if (c == Color.YELLOW) {
g.setColor(Color.YELLOW);
g.fillOval(x, y2, w, h);
} else if (c == Color.GREEN) {