How to Color Code Text in a Java Swing Application?

How to Customize Text Color in JTextArea

JTextArea is specifically designed for handling plain text, which means applying color changes to individual characters affects the entire document. However, using JTextPane or JEditorPane allows for more granular control, enabling you to color code different parts of your text.

To achieve this text customization:

1. Create a JTextPane instance: This is where your text with color changes will be displayed.

JTextPane tPane = new JTextPane();

2. Use appendToPane to add colored text: The appendToPane method allows you to specify the text and its color:

appendToPane(tPane, "Your Text", Color.YOUR_COLOR);

3. Define the appendToPane method: This method does the heavy lifting of setting the text attributes and adding them to the JTextPane.

private void appendToPane(JTextPane tp, String msg, Color c) {
    StyleContext sc = StyleContext.getDefaultStyleContext();
    AttributeSet aset = sc.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Foreground, c);

    // Additional styling options (e.g., font, alignment):
    aset = sc.addAttribute(aset, StyleConstants.FontFamily, "Your Font");
    aset = sc.addAttribute(aset, StyleConstants.Alignment, StyleConstants.ALIGN_JUSTIFIED);

    int len = tp.getDocument().getLength();
    tp.setCaretPosition(len);
    tp.setCharacterAttributes(aset, false);
    tp.replaceSelection(msg);
}

With JTextPane, you can now easily highlight specific parts of your text in different colors. This enhanced text customization can make your code easier to read and understand.

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