编写JAVA程序:用户点击第一幅,上一幅,下一幅,最后一幅四个按钮,浏览程序中加载好的五幅图片.

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

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

public class ImageFrame extends JFrame implements ActionListener {
// 5个图片的名字
public static final String[] IMAGE_NAMES = { "0.png", "1.png", "2.png",
"3.png", "4.png" };
private JButton btnFirst, btnNext, btnPre, btnLast;
private int currentIndex = 0;
private JLabel imageLabel;

public ImageFrame() {
super("图片");
setSize(600, 400);
setLayout(new BorderLayout());

init();

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);