画笔

package com.yuecheng.guistudy;

import java.awt.*;

public class TestPaint01 {
    public static void main(String[] args) {
        new myPaint().loadFrame();


    }
}

class myPaint extends Frame{
    public void loadFrame(){
        setBounds(200,200,500,500);
        setVisible(true);

    }
    //创建画笔
    @Override
    public void paint(Graphics g) {
        //super.paint(g);
        //画笔需要有颜色，画笔可以画画
        g.setColor(Color.blue);
        g.drawOval(100,100,100,100);
        g.fillOval(200,300,100,100);
        g.setColor(Color.yellow);
        g.fillRect(50,50,50,50);
        //养成习惯，用完还原最初颜色
        g.setColor(Color.BLACK);
    }
}