panelframe.java

Java程序设计大学教程程序源代码

/**
 * <p>Title:窗体演示程序 </p>
 *
 * <p>Copyright: Copyright (c) 2005</p>
 *
 * <p>Company: 刘艺</p>
 *
 * @author 刘艺
 * @version 1.0
 */

package jbookch6;

import java.awt.*;
import java.io.*;
import javax.swing.*;
import javax.imageio.*;
import java.net.*;

public class PanelFrame extends SimpleFrame {

    /** Creates a new instance of PanelFrame */
    public PanelFrame(int width,int height) {
        super(width,height);
    }

    public static void main(String args[]) {
        PanelFrame frame=new PanelFrame(300,200);
        DrawPanel contentPanel=new DrawPanel( );
        //把其它组件添加到面板中;
        contentPanel.add(new JButton("OK"));
        frame.setContentPane(contentPanel);
        frame.setVisible(true);
    }
}

class ContentPanel extends JPanel{
    //在面板中绘制图文;
    public void paintComponent(Graphics g)  {
        super.paintComponent(g);
        g.drawOval(120, 60, 150, 70);//绘制一个椭圆
        try{
            g.drawString("这是一个面板！",160,100);//绘制一行文字
            Image image=ImageIO.read(new URL(urlname));
            g.drawImage(image,30,30,null);//绘制一幅图片
        } catch ( IOException  e ){
            g.drawString("加载图形失败！",100,100);
        }
    }

    String urlname="http://www.liu-yi.net/HTML/IMAGE/stamp_yi.JPG";

}