frame 显示多张图片（如图：按下按钮1，显示图片1，之后按下按钮2，在图片1右边显示图片2）

import javax.swing.*

import java.awt.image.*

import java.awt.event.*

public class JButtonImage extends JFrame {

JLabel lbl1, lbl2

public JButtonImage(){

super("JFrameSimpleImage Demo")

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

this.setSize(400, 300)

this.setLayout(new GridLayout(2, 2) )

img1 = Toolkit.getDefaultToolkit().getImage("image1.jpg")

img2 = Toolkit.getDefaultToolkit().getImage("image2.jpg")

lbl1=new JLabel()

JButton btn1 = new JButton("Image-1")

lbl2=new JLabel()

JButton btn2 = new JButton("Image-2")

this.add(lbl1)

this.add(lbl2)

this.add(btn1)

this.add(btn2)

this.setVisible(true)

this.validate()

this.repaint()

btn1.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

lbl1.setIcon(new ImageIcon(img1))

}

})

btn2.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

lbl2.setIcon(new ImageIcon(img2))

}

})

}

Image img1, img2

public static void main(String args[]){

javax.swing.SwingUtilities.invokeLater(new Thread(){

public void run(){

new JButtonImage()

}

})

}

}

请参考

JLabel background = new JLabel(new ImageIcon(url))//url代表你图片的路径

this.add（background）即可//将你的jlabel背景加到jframe上

当然jframe也有专门的设置背景的复方法，忘掉了，你查一下

最好下一个JDK -API手册，一查便知