java如何在ImageIcon前面移动JLabel？

1 周，5 日 Questions & Answers 691

我认为代码中的所有内容都是正确的，我只需要知道如何分类不同的层

import java.awt.BorderLayout; import java.awt.Container; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.event.ActionEvent; import javax.swing.AbstractAction; import javax.swing.Action; import javax.swing.ImageIcon; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.KeyStroke; class FullSceenToggleAction extends AbstractAction { private JFrame frame; private GraphicsDevice fullscreenDevice; public FullSceenToggleAction(JFrame frame) { this(frame, GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice()); } public FullSceenToggleAction(JFrame frame, GraphicsDevice fullscreenDevice) { this.frame = frame; this.fullscreenDevice = fullscreenDevice; } @Override public void actionPerformed(ActionEvent e) { frame.dispose(); if (frame.isUndecorated()) { fullscreenDevice.setFullScreenWindow(null); frame.setUndecorated(false); } else { frame.setUndecorated(true); fullscreenDevice.setFullScreenWindow(frame); } frame.setVisible(true); frame.repaint(); } } public class Main { public static final void addKeyBinding(JComponent c, String key, final Action action) { c.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(key), key); c.getActionMap().put(key, action); c.setFocusable(true); } public static void main(String[] args) { final JFrame frame = new JFrame("Fullscreen Toggle Test"); Container contentPane = frame.getContentPane(); contentPane.add(new JLabel("Hey"), BorderLayout.CENTER); frame.add(new JLabel(new ImageIcon("C:/Users/SamBr/Pictures/DesktopBackgrounds/image.png"))); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(960, 600); frame.setLocationRelativeTo(null); frame.setVisible(true); frame.setTitle("Virtual World"); addKeyBinding(frame.getRootPane(), "F11", new FullSceenToggleAction(frame)); } }

当我运行代码时，我看到了图像，但在图像前面或屏幕上的任何地方都没有文本“嘿”，我不明白为什么它没有显示，或者我如何使它在图像前面可见

# 1 楼答案

谁知道你到底想做什么

但以下是一些根据您的要求在不同位置显示标签上文本的示例：

import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;

public class LabelImageText extends JPanel
{
    public LabelImageText()
    {
        JLabel label1 = new JLabel( new ColorIcon(Color.ORANGE, 100, 100) );
        label1.setText( "Easy Way" );
        label1.setHorizontalTextPosition(JLabel.CENTER);
        label1.setVerticalTextPosition(JLabel.CENTER);
        add( label1 );

        //

        JLabel label2 = new JLabel( new ColorIcon(Color.YELLOW, 200, 150) );
        label2.setLayout( new BoxLayout(label2, BoxLayout.Y_AXIS) );
        add( label2 );

        JLabel text = new JLabel( "More Control" );
        text.setAlignmentX(JLabel.CENTER_ALIGNMENT);
        label2.add( Box.createVerticalGlue() );
        label2.add( text );
        label2.add( Box.createVerticalStrut(10) );

        //

        JLabel label3 = new JLabel( new ColorIcon(Color.GREEN, 200, 150) );
        label3.setLayout( new GridBagLayout() );
        add( label3 );

        JLabel text3 = new JLabel();
        text3.setText("<html><center>Text<br>over<br>Image<center></html>");
        text3.setLocation(20, 20);
        text3.setSize(text3.getPreferredSize());
        label3.add( text3 );

        //

        JLabel label4 = new JLabel( new ColorIcon(Color.CYAN, 200, 150) );
        add( label4 );

        JTextPane textPane = new JTextPane();
        textPane.setText("Add some text that will wrap at your preferred width");
        textPane.setEditable( false );
        textPane.setOpaque(false);
        SimpleAttributeSet center = new SimpleAttributeSet();
        StyleConstants.setAlignment(center, StyleConstants.ALIGN_CENTER);
        StyledDocument doc = textPane.getStyledDocument();
        doc.setParagraphAttributes(0, doc.getLength(), center, false);
        textPane.setBounds(20, 20, 75, 100);
        label4.add( textPane );
    }

    public static class ColorIcon implements Icon
    {
        private Color color;
        private int width;
        private int height;

        public ColorIcon(Color color, int width, int height)
        {
            this.color = color;
            this.width = width;
            this.height = height;
        }

        public int getIconWidth()
        {
            return width;
        }

        public int getIconHeight()
        {
            return height;
        }

        public void paintIcon(Component c, Graphics g, int x, int y)
        {
            g.setColor(color);
            g.fillRect(x, y, width, height);
        }
    }

    private static void createAndShowUI()
    {
        JFrame frame = new JFrame("LabelImageText");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add( new LabelImageText() );
        frame.pack();
        frame.setLocationRelativeTo( null );
        frame.setVisible( true );
    }

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

简单的解决方案只是使用一个带有图标和文本的标签。其他人使用其他组件并利用布局管理器

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java如何在ImageIcon前面移动JLabel？

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