關于javaJFrame畫圖的一段程序？

按照你的要求定義一個新方法,在JFrame上繪圖的Java程序如下

import java.awt.Graphics;import javax.swing.JFrame;public class C extends JFrame{ static int x,y,width,height; public void paint(Graphics g){ super.paint(g); g.drawOval(x, y, width, height); } public static void drawCircle(int i, int j, int k, int l) { x=i;y=j;width=k;height=l; } public static void main(String[] args) { C c=new C(); c.setTitle("畫圓"); c.setSize(300,300); drawCircle(100,200,50,50); c.repaint(); c.setLocationRelativeTo(null); c.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); c.setVisible(true); }}

運行結果