java – 如何添加jlabel图像悬停？

发布时间：2020-12-15 05:09:06 所属栏目：Java 来源：网络整理

导读：我如何继续添加JLabel悬停？就像当您将鼠标移到顶部时,JLabel a和新图像将重叠.我知道如何使用按钮,但相同的技术对JLabel不起作用.有人会指导我添加JLabel悬停吗？拜托,谢谢. package src;import java.awt.Dimension;import javax.swing.ImageIcon;import ja

我如何继续添加JLabel悬停？就像当您将鼠标移到顶部时,JLabel a和新图像将重叠.我知道如何使用按钮,但相同的技术对JLabel不起作用.有人会指导我添加JLabel悬停吗？拜托,谢谢.

package src;

import java.awt.Dimension;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

/*
 * @Author - 0x29A
 * 
 * 
 */
public class Jframe {

    public static void main(final String args[]) {

        /*
         * @Images
         */
        final ImageIcon icon = new ImageIcon("Data/button.png");
        final JLabel label = new JLabel(icon);

        final ImageIcon icon1 = new ImageIcon("Data/button1.png");
        final JLabel label1 = new JLabel(icon1);

        final ImageIcon icon2 = new ImageIcon("Data/button2.png");
        final JLabel label2 = new JLabel(icon2);

        final ImageIcon icon3 = new ImageIcon("Data/button3.png");
        final JLabel label3 = new JLabel(icon3);

        final ImageIcon icon4 = new ImageIcon("Data/button4.png");
        final JLabel label4 = new JLabel(icon4);

        final ImageIcon icon5 = new ImageIcon("Data/button5.png");
        final JLabel label5 = new JLabel(icon5);

        final ImageIcon icon6 = new ImageIcon("Data/background.png");
        final JLabel label6 = new JLabel(icon6);

        /*
         * @Image Location
         */
        label.setBounds(282,255,96,96);
        label1.setBounds(384,96);
        label2.setBounds(282,153,96);
        label3.setBounds(384,198,96);
        label4.setBounds(181,152,96);
        label5.setBounds(181,96);
        label6.setBounds(0,765,503);

        /*
         * @Frame
         */
        final JFrame frame = new JFrame("test");
        frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
        frame.setPreferredSize(new Dimension(765,503));
        frame.setLayout(null);
        frame.add(label);
        frame.add(label1);
        frame.add(label2);
        frame.add(label3);
        frame.add(label4);
        frame.add(label5);
        frame.add(label6);
        frame.pack();
        frame.setResizable(false);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

解决方法

举个简单的例子,它使用MouseListener和MosueAdapter来监视JLabel上的mouseExited()和mouseEntered()事件,当调用这些方法中的任何一个时(即当鼠标悬停在标签上时),图片就会改变：

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.MouseAdapter;
import javax.swing.*;

public class LabelHoverTest extends JFrame {

    Icon pic1;
    Icon pic2;
    JLabel label;

    public LabelHoverTest(String title) {
        super(title);
        pic1 = UIManager.getIcon("OptionPane.informationIcon");
        pic2 = UIManager.getIcon("OptionPane.questionIcon");
        createAndShowUI();
    }

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

            @Override
            public void run() {
                new LabelHoverTest("Label Hover Test").setVisible(true);
            }
        });
    }

    private void createAndShowUI() {
        setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);
        addComponentsToPane(getContentPane());
        setSize(300,300);
        setLocationRelativeTo(null);
        setVisible(true);
    }

    private void addComponentsToPane(Container contentPane) {
        label = new JLabel(pic1);

        contentPane.add(label,BorderLayout.CENTER);

        label.addMouseListener(new MouseAdapter() {

            @Override
            public void mouseEntered(java.awt.event.MouseEvent evt) {
                label.setIcon(pic2);
            }

            @Override
            public void mouseExited(java.awt.event.MouseEvent evt) {
                label.setIcon(pic1);
            }
        });
    }
}

（编辑：李大同）

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