Java Graphics_1
package com.han;import java.awt.Color;import java.awt.Container;import java.awt.FlowLayout;import java.awt.Graphics;import javax.swing.JButton;import javax.swing.JFrame;public class Graphics_1 extends JFrame {/** * */private static final long serialVersionUID = -5861565474703590207L;JButton button = new JButton("JButton");@SuppressWarnings("serial")Container container = new Container() {@Overridepublic void paint(Graphics g) {/* If this method is reimplemented, super.paint(g) should be * called so that lightweight components (here is JButton) * are properly rendered. * However, for comparison, applications that override paint() * method in Canvas which is in parallel level to Container * need not call super.paint(g). */super.paint(g);g.setColor(Color.BLACK);g.drawLine(5, 5, 15, 5);}};public Graphics_1() {// TODO Auto-generated constructor stub/* setContentPane(container); 与 this.add(container); 以及add(container); * 都是一样的效果 *///setContentPane(container);//this.add(container);add(container); // java.awt.Container.add(Component comp)container.setLayout(new FlowLayout());container.add(button);}/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubfinal Graphics_1 frame = new Graphics_1();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setBounds(100, 100, 300, 200);frame.setVisible(true);}}