测试画笔

package cn.rushangw.lesson03;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestPaint {
    public static void main(String[] args) {
        new MyPaint().loadFrame();
    }
}


class MyPaint extends Frame{

    public void loadFrame(){
        setVisible(true);
        setBounds(200,200,600,500);
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }

    //画笔
    @Override
    public void paint(Graphics g) {
        //画笔有颜色，可以画画
        g.setColor(Color.red);
        //画一个空心圆
        g.drawOval(100,100,100,100);
        //实心的圆
        g.fillOval(100,100,100,100);
        //改变颜色
        g.setColor(Color.green);
        g.fillRect(100,200,200,100);
        
        //养成习惯画笔使用完成还原成最初的颜色  也就是黑色
        
        g.setColor(Color.black);
    }
}