swing4.java

来自「java 初学者学习实例」· Java 代码 · 共 26 行

import javax.swing.*;
import java.awt.*;

class Mycanvas extends JPanel
{
	public void paintComponent(Graphics g)
	{
	    super.paintComponent(g);
		g.setColor(Color.red);
		g.drawString("a Jpanel used as canvas",50,50);
	}
}

public class Swing4 extends JApplet
{
    Mycanvas canvas;JPanel panel;JButton button ;
	
  public void init()
  {
  	canvas = new Mycanvas() ;panel = new JPanel(); button= new JButton("ok");
	panel.add(button);Container con = getContentPane();
	con.add(panel,BorderLayout.NORTH);con.add(canvas,BorderLayout.CENTER);
  }
}