e1106.java

java小程序

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class E1106 extends JFrame implements ActionListener
{
private Timer t;
private int degreen=0;
public E1106()
{
super("E1106:动态填满红色弧形");
t=new Timer(200,this);
t.start();
setSize(400,200);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)//定义关闭窗口方法 
{
t.stop();
System.exit(0);
}
});
setVisible(true);
}

public void actionPerformed(ActionEvent e)//响应各种事件
{
degreen+=10;
if(degreen>360) degreen=0;
Graphics g=getGraphics();
g.setColor(Color.red);
g.fillArc(100,100,100,80,degreen,degreen+10);
g.dispose();
}

public void paint(Graphics g)
{
//g.drawString("按顺序变换水平线的红绿蓝色",60,60);
g.setColor(Color.red);
g.fillArc(100,100,100,80,degreen,degreen+10);
}

public static void main(String args[])
{
E1106 app=new E1106();
}
}