10:画笔Paint
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
1 package com.gui.lesson3; 2 3 import java.awt.*; 4 5 public class TestPaint { 6 public static void main(String[] args) { 7 new MyPaint().loadFrame(); 8 } 9 } 10 11 class MyPaint extends Frame { 12 13 public void loadFrame() { 14 setBounds(200, 200, 600, 400); 15 setVisible(true); 16 } 17 18 //画笔 19 @Override 20 public void paint(Graphics g) { 21 //画笔,画笔需要有颜色,画笔可以画画 22 g.setColor(Color.red); 23 g.drawOval(100, 100, 100, 100); 24 g.fillOval(200, 200, 100, 100);//实心的圆 25 26 g.setColor(Color.green); 27 g.fillRect(300, 100, 200, 100);//实心的矩形 28 29 //养成习惯,画笔用完,将它还原到最初的颜色,即将颜色代码注掉 30 } 31 }
注掉设置颜色代码后,空心的显默认色白色,实心的显默认色黑色