ch9_23.java

来自「java图形用户界面设计 包括如何创建窗体 设计界面 管理布局 绘制图形 」· Java 代码 · 共 44 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ch9_23 extends JFrame
{
    static graphicsCanvas gc;
    JButton b1;
    public ch9_23()
    {
        setBounds(20,20,500,300);
        getContentPane().setLayout(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);              
    }
    public static void main(String [] args)
    {
        ch9_23 f=new ch9_23();
        
        gc=new graphicsCanvas();
        gc.setSize(100,100);
        gc.setBackground(Color.BLUE);
        f.getContentPane().add(gc);
        gc.addMouseListener(new MouseAdapter()
        {
            public void mouseClicked(MouseEvent e)
            {
                for (int i=0;i<150;i++)
                {
                    gc.setLocation(i,0);
                }
            }
        });
        f.show();
    }    
}
class graphicsCanvas extends Canvas
{
    public void paint(Graphics g)
    {
        g.drawOval(10,50,40,40);
        g.drawLine(10,50,50,90);
        g.drawLine(50,50,10,90);
    }
}