ch11_4.java

来自「java练习程序」· Java 代码 · 共 35 行

import java.applet.*;
import java.awt.*;

class MyCanvas extends Canvas
{
	MyCanvas()
	{
		getSize();
	}
	public void paint(Graphics g)
	{
		g.setColor(Color.red);
		g.drawRect(3,3,40,40);
		g.drawOval(20,45,30,30);
		g.setColor(Color.yellow);
		g.fillRect(3,80,20,50);
	}
	public Dimension getPreferredSize()
	{
		return new Dimension(200,200);
	}
}

public class Ch11_4 extends Applet
{
	MyCanvas mycanvas;
	public void init()
	{
		mycanvas=new MyCanvas();
		add(new Button("带画布的小程序"));
		add(mycanvas);
	}
}