如何在Java Swing中自动更改图像? [英] how to auto change image in java swing?

问题描述

我正在创建一个Java桌面应用程序，我想在其中显示图像，并且希望所有图像每隔5秒自动更改一次，我不知道该怎么做

Hi i am creating a java desktop application where i want to show image and i want that all image should change in every 5 sec automatically i do not know how to do this

这是我的代码

public class ImageGallery extends JFrame
{
    private ImageIcon myImage1 = new ImageIcon ("E:\\SOFTWARE\\TrainPIS\\res\\drawable\\yellow.png");
    private ImageIcon myImage2 = new ImageIcon ("E:\\SOFTWARE\\TrainPIS\\res\\drawable\\d.jpg");
    private ImageIcon myImage3 = new ImageIcon ("E:\\SOFTWARE\\TrainPIS\\res\\drawable\\e.jpg");
    private ImageIcon myImage4 = new ImageIcon ("E:\\SOFTWARE\\TrainPIS\\res\\drawable\f.jpg");
    JPanel ImageGallery = new JPanel();
    private ImageIcon[] myImages = new ImageIcon[4];
    private int curImageIndex=0;

    public ImageGallery ()
        {   
            ImageGallery.add(new JLabel (myImage1));
            myImages[0]=myImage1;
            myImages[1]=myImage2;
            myImages[2]=myImage3;
            myImages[3]=myImage4;

            add(ImageGallery, BorderLayout.NORTH);

            JButton PREVIOUS = new JButton ("Previous");

            JButton NEXT = new JButton ("Next");

            JPanel Menu = new JPanel();
            Menu.setLayout(new GridLayout(1,4));
            Menu.add(PREVIOUS);

            Menu.add(NEXT);

            add(Menu, BorderLayout.SOUTH);



        }

我该如何实现? 预先感谢

How can i achieve this? Thanks in advance

推荐答案

在此示例中，List<JLabel>保存从List<Icon>中选择的每个图像.在javax.swing.Timer的每个步骤中，图像列表都会被随机排列，并且每个图像都被分配给一个标签.

In this example, a List<JLabel> holds each image selected from a List<Icon>. At each step of a javax.swing.Timer, the list of images is shuffled, and each image is assigned to a label.

import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;

/**
 * @see http://stackoverflow.com/a/22423511/230513
 * @see http://stackoverflow.com/a/12228640/230513
 */
public class ImageShuffle extends JPanel {

    private List<Icon> list = new ArrayList<Icon>();
    private List<JLabel> labels = new ArrayList<JLabel>();
    private Timer timer = new Timer(1000, new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {
            update();
        }
    });

    public ImageShuffle() {
        this.setLayout(new GridLayout(1, 0));
        list.add(UIManager.getIcon("OptionPane.errorIcon"));
        list.add(UIManager.getIcon("OptionPane.informationIcon"));
        list.add(UIManager.getIcon("OptionPane.warningIcon"));
        list.add(UIManager.getIcon("OptionPane.questionIcon"));
        for (Icon icon : list) {
            JLabel label = new JLabel(icon);
            labels.add(label);
            this.add(label);
        }
        timer.start();
    }

    private void update() {
        Collections.shuffle(list);
        int index = 0;
        for (JLabel label : labels) {
            label.setIcon(list.get(index++));
        }
    }

    private void display() {
        JFrame f = new JFrame("ImageShuffle");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(this);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new ImageShuffle().display();
            }
        });
    }
}

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