Multiline JLabels - Java [duplicate]

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猫巷女王i

2021-01-19 21:58

It is possible to use (basic) CSS in the HTML.

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一生所求

2021-01-19 21:59

I recommend creating your own custom component that emulates the JLabel style while wrapping:

import javax.swing.JTextArea;

public class TextNote extends JTextArea {
    public TextNote(String text) {
        super(text);
        setBackground(null);
        setEditable(false);
        setBorder(null);
        setLineWrap(true);
        setWrapStyleWord(true);
        setFocusable(false);
    }
}

Then you just have to call:

new TextNote("Here is multiline content.");

Make sure that you set the amount of rows (textNote.setRows(2)) if you want to pack() to calculate the height of the parent component correctly.

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无人共我

2021-01-19 22:11

I suggest to use a JTextArea instead of a JLabel

and on your JTextArea you can use the method .setWrapStyleWord(true) to change line at the end of a word.

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清歌不尽

2021-01-19 22:21
If you don't mind wrapping your label text in an html tag, the JLabel will automatically word wrap it when its container's width is too narrow to hold it all. For example try adding this to a GUI and then resize the GUI to be too narrow - it will wrap:
```
new JLabel("<html>This is a really long line that I want to wrap around.</html>");
```
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孤街浪徒

2021-01-19 22:23

MultiLine Label with auto adjust height. Wrap text in Label

private void wrapLabelText(JLabel label, String text) {
    FontMetrics fm = label.getFontMetrics(label.getFont());
    PlainDocument doc = new PlainDocument();
    Segment segment = new Segment();
    try {
        doc.insertString(0, text, null);
    } catch (BadLocationException e) {

    }

    StringBuffer sb = new StringBuffer("<html>");
    int noOfLine = 0;
    for (int i = 0; i < text.length();) {
        try {
            doc.getText(i, text.length() - i, segment);
        } catch (BadLocationException e) {
            throw new Error("Can't get line text");
        }
        int breakpoint = Utilities.getBreakLocation(segment, fm, 0, this.width - pointerSignWidth - insets.left - insets.right, null, 0);
        sb.append(text.substring(i, i + breakpoint));
        sb.append("<br/>");
        i += breakpoint;

        noOfLine++;
    }
    sb.append("</html>");
    label.setText(sb.toString());

    labelHeight = noOfLine * fm.getHeight();
    setSize();
}

Thanks, Jignesh Gothadiya

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