java绘制图形

源代码

package Experiments; import javax.swing.*; import java.awt.*; public class Experiment76 { public static void main(String[] args) { new PaintShape(); } } class PaintShape extends JFrame{ public PaintShape(){ setTitle("绘制图形"); setSize(300, 200); JPanel pan = new MyPanel(); add(pan); pan.setBounds(0, 0, 300, 200); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); } class MyPanel extends JPanel{ public void paintComponent(Graphics g){ g.setColor(Color.black); //空心矩形 g.drawRect(50, 50, 50, 50); //实心矩形 g.fillRect(120, 50, 50, 50); //空心圆 g.drawOval(50, 120, 50, 50); //实心圆 g.fillOval(120, 120, 50, 50); } } }

运行结果