如何在JButton图标上方和下方设置文本？

Question

I want to set text a JButton 's icon. At the moment, in order to achieve this, I override the layout manager and use three JLabel instances (ie 2 for text and 1 for the icon). But this seems like a dirty solution.

Is there a more direct way of doing this?

I'm not looking for a multi-line solution, I'm looking for a multi-label solution. Although this article refers to it as a multi-line solution, it actually seems to refer to a multi-label solution.

---

EXAMPLE

import java.awt.Component;
import java.awt.FlowLayout;
import javax.swing.BoxLayout;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

public final class JButtonDemo {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable(){
            @Override
            public void run() {
                createAndShowGUI();
            }
        });
    }


    private static void createAndShowGUI(){
        final JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new FlowLayout());
        frame.add(new JMultiLabelButton());
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    private static final class JMultiLabelButton extends JButton
    {
        private static final long serialVersionUID = 7650993517602360268L;

        public JMultiLabelButton()
        {
            super();
            setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
            add(new JCenterLabel("Top Label"));
            add(new JCenterLabel(UIManager.getIcon("OptionPane.informationIcon"))); 
            add(new JCenterLabel("Bottom Label"));
        }
    }

    private static final class JCenterLabel extends JLabel
    {
        private static final long serialVersionUID = 5502066664726732298L;

        public JCenterLabel(final String s)
        {
            super(s);
            setAlignmentX(Component.CENTER_ALIGNMENT);
        }

        public JCenterLabel(final Icon i)
        {
            super(i);
            setAlignmentX(Component.CENTER_ALIGNMENT);
        }
    }

}

Answer 1

There is not way to split the text between the top/bottom of a JButton. This would involve custom painting.

Since I'm not sure of your exact requirement I'll just through out a few random ideas:

1. You can use a JButton with text & icon. There are methods in the API that allow you to controal where text is positioned relative to the icon. Then you would need a second label for the other line of text. Basically the same as you current solution but you only need two labels.

2. You could use the Text Icon and Compound Icon classes to create 1 Icon out of 3 separate Icons. Then you can just add the icon to a button.

3. Use a JTextPane. Its supports an insertIcon() method. So you could add a line of text, add the icon and then add the other line of text. You can play with the paragraph attributes of the text pane to align the text horizontally within the space if you don't want the text left justified. You can also play with the background color to make it look like a label.

Example using the CompoundIcon:

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

public final class JButtonDemo {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable(){
            @Override
            public void run() {
                createAndShowGUI();
            }
        });
    }


    private static void createAndShowGUI()
    {
        JButton button = new JButton();

        CompoundIcon icon = new CompoundIcon(CompoundIcon.Axis.Y_AXIS,
            new TextIcon(button, "Top Label"),
            UIManager.getIcon("OptionPane.informationIcon"),
            new TextIcon(button, "Bottom Label"));

        button.setIcon( icon );
        button.setFocusPainted( false );

        final JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new FlowLayout());
        frame.add( button );
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

Answer 2

you have two four options

1) use JLabel + Icon + Html (<= Html 3.2)

2) use XxxButtonUI and override all required methods from API

3) JLayeredPane with translucency???, another Layout with translucency, as JLabel or JComponent to the JButton,

4) there are around lots of Graphics SW that can to prepare Background as *.jpg for Icon, then is very simple to change whatever by Event, Action or actual setting for JButton

not correct way is looking for JLabel + Whatever instead of JButton, I think that is halfsized workaround

Answer 3

在这里找到另一个LayoutManager ： http ： //download.oracle.com/javase/tutorial/uiswing/layout/visual.html