javaGUI实现图片切换操作

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javaGUI实现图片切换操作，代码如下：
package www.629niuniu.com;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Container;import java.awt.TextArea;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JTextArea;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class Test3 extends JFrame implements ActionListener{//容器窗口  (相当于一个桌子)private JFrame frame;private JButton  jbn1=new JButton("随机下一张");private JButton  jbn2=new JButton("随机上一张");//附属容器  (相当于桌子上的桌布)private Container container=null;private JLabel jlabel=null;private JLabel jlabe2=null;private JLabel jlabe3=null;public static void main(String[] args) {Test3 test3=new Test3();}public  Test3(){//设置窗口的标题frame = new JFrame("变换图片");this.setTitle("变换图片");//获得容器中的附属容器container = this.getContentPane();container.setLayout(new BorderLayout());int i=(int)(Math.random()*10);jlabel=new JLabel(new ImageIcon("images/"+i+".jpg"));container.add(jlabel);container.add(jbn1,BorderLayout.SOUTH);container.add(jbn2,BorderLayout.NORTH);//创建监听器jbn1.setActionCommand("下一张");jbn2.setActionCommand("上一张");jbn1.addActionListener(this);jbn2.addActionListener(this);this.setLocation(150,0);this.setSize(1024,668);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setVisible(true);}@Overridepublic void actionPerformed(ActionEvent e) {if(e.getActionCommand().equals("上一张")){jlabel.setVisible(false);int m=(int)(Math.random()*10);jlabel=new JLabel(new ImageIcon("images/"+m+".jpg"));container.add(jlabel);jlabel.setVisible(true);System.out.println("您点击了上一张"+"m="+m);}if(e.getActionCommand().equals("下一张")){jlabel.setVisible(false);int n=(int)(Math.random()*10);jlabel=new JLabel(new ImageIcon("images/"+n+".jpg"));container.add(jlabel);jlabel.setVisible(true);System.out.println("您点击了上一张"+"n="+n);}}}

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