canvastest.java

200多个自己编的java程序,大家可以学一下.

/*
 * CanvasTest.java
 *
 * Created on 2004年9月22日, 下午7:32
 */

/**
 *
 * @author  litertiger
 */
import java.awt.*;
public class CanvasTest extends java.applet.Applet {
    
    /** Initialization method that will be called after the applet is loaded
     *  into the browser.
     */
   MyCanvas s= new MyCanvas();
   MyCanvas s2= new MyCanvas();
   MyCanvas s3= new MyCanvas();
    public void init() {
        add(s);
        add(s2);
        add(s3);
        // TODO start asynchronous download of heavy resources
    }
    
    // TODO overwrite start(), stop() and destroy() methods
}

/**
 *
 */
class MyCanvas extends Canvas {
    MyCanvas()
    {
        //画布一定要在创建类的构造方法中给出画布的尺寸
        getSize();
        //给出大小
        //然后用后面的方法getPreferredSize（）调整
    }
    public void paint(Graphics g)
    //一定要对父对象的paint方法重写
    {
        g.setColor(Color.red);
        g.drawString(" I'm writing on it!!!!!!!!!!", 6, 10);
        g.draw3DRect(10,20, 40,50, true);
        
    }
    public Dimension getPreferredSize()
    {
        return new Dimension(160,100);
    }
    }