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Editorial Team
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Asked: 2026-05-31T02:14:35+00:00

I haven’t used HTML in JTextPane before and playing with this today. I come

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I haven’t used HTML in JTextPane before and playing with this today. I come across with strange output.

Here is my simple code, htmlStr contains contains a tag <aa> :

public class HtmlInJTextPaneTest extends JFrame {
    private JTextPane jtp;
    private String htmlStr= "<html><body><b>What is this</b> <aa > ?? </body></html>";
    public HtmlInJTextPaneTest() {
        jtp = new JTextPane();
        jtp.setContentType("text/html");
        jtp.setText(htmlStr);
        //jtp.setEditable(false);

        //jFrame setup
        add(jtp);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(200, 100);
        setVisible(true);
    }
    public static void main(String[] args) {
        new HtmlInJTextPaneTest();
    }
}

The output of this is :

enter image description here

I don’t know why the box (seems like input field) appeared with tag name aa in it?

It disappears when I set editable false on JTextPane object jtp.

    jtp.setEditable(false);

Can you please explain it?

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1 Answer

  1. Editorial Team

    You can use this http://java-sl.com/custom_tag_html_kit.html as example of custom tag support in HTMLEditorKit.

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