我有一组存储在数组中的图像,我需要像幻灯片一样显示它们.下一个和上一个有两个JButton,它们使用户可以查看图像.但是我无法使按钮起作用.有什么建议吗？

谢谢

import java.awt.Graphics;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JPanel;

public class slides extends JPanel implements ActionListener {

// Data Field

private final ImageIcon imageArray[];

private ImageIcon image;

JButton nextButton;

JButton prevButton;

int page = 0;

int nextPage = page + 1;

int prevPage = page - 1;

int numOfSlides = 28;

// Obtains and stores slides in imageArray

public slides() {

imageArray = new ImageIcon[numOfSlides];

for (int i = 0; i < imageArray.length; i++) {

imageArray[i] = new ImageIcon("Slide " + (i + 1) + ".png");

}

}

// Displays slides

@Override

public void paintComponent(Graphics g) {

super.paintComponent(g);

boolean began = true;

// creates next button

nextButton = new JButton("next");

nextButton.setBounds(400, 574, 70, 30);

nextButton.addActionListener(this);

add(nextButton);

// creates previous button

prevButton = new JButton("previous");

prevButton.setBounds(0, 574, 85, 30);

prevButton.addActionListener(this);

add(prevButton);

// displays slide 1

if (began == true) {

image = imageArray[page];

image.paintIcon(this, g, 0, 0);

began = false;

}

// displays other slides based on preference

if (page == nextPage) {

image = imageArray[page + 1];

image.paintIcon(this, g, 0, 0);

nextPage = page + 1;

prevPage = page - 1;

}

if (page == prevPage) {

nextPage = page + 1;

prevPage = page - 1;

image = imageArray[page - 1];

image.paintIcon(this, g, 0, 0);

}

// Removes buttons accordingly

if(page == imageArray.length - 1) {

remove(nextButton);

}

if(page == 0){

remove(prevButton);

}

}

@Override

public void actionPerformed(ActionEvent event) {

if (event.getSource() == nextButton) {

page++;

image = imageArray[page];

}

if (event.getSource() == prevButton) {

page--;

image = imageArray[page];

}

}

}