Java Swing中怎样简单方便的设置背景图片

   这里想到了两种方式：一种是使用JPanel，另一种使用JLabel来实现。

       下面是测试用源码：

1.JPanel（源代码）

package oo;

import java.awt.Graphics;
import java.awt.Image;
import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;

publicclass Drawing {

    JFrame jframe = new JFrame();
publicstatic JPanel GImage = null;

public Drawing() {
        initFrame();
    }

// 初始化窗口
publicvoid initFrame() {
// 利用JPanel添加背景图片

        GImage = new JPanel() {

protectedvoid paintComponent(Graphics g) {
                ImageIcon icon = new ImageIcon("image\\benbenla.jpg");
                Image img = icon.getImage();
                g.drawImage(img, 0, 0, icon.getIconWidth(),
                        icon.getIconHeight(), icon.getImageObserver());
                jframe.setSize(icon.getIconWidth(), icon.getIconHeight());

            }

        };
        jframe.setTitle("测试背景图片");
        jframe.add(GImage);
        jframe.pack();
        jframe.setVisible(true);
        jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }

publicstaticvoid main(String[] args) {
new Drawing();

    }

}

2.JLabel源代码

package swing.draw;

import java.awt.Image;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

/** 利用JLabel来构建图片 */

publicclass Drawing2 {
    JLabel jlpic = new JLabel();
    JFrame jframe = new JFrame();

public Drawing2() {

        init1Frame();
    }

publicvoid init1Frame() {
        ImageIcon icon = new ImageIcon("image\\benbenla.jpg");
        icon.setImage(icon.getImage().getScaledInstance(icon.getIconWidth(),
                icon.getIconHeight(), Image.SCALE_DEFAULT));
        System.out.println(icon.getIconHeight() + "" + icon.getIconWidth());
        jlpic.setBounds(0, 0, 1366, 768);
        jlpic.setHorizontalAlignment(0);
        jlpic.setIcon(icon);
        jframe.setSize(1366, 768);
        jframe.add(jlpic);
        jframe.pack();
        jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jframe.setVisible(true);

    }

publicstaticvoid main(String args[]) {

new Drawing2();
    }
}