How to disable the automatic HTML support of JLabel?

Question

A Swing JLabel automatically interprets any text as HTML content, if it starts with . If the content of this HTML is an image with invalid URL this will cause th

Answer 1

For a simple JLabel, you can call the JComponent method

myLabel.putClientProperty("html.disable", Boolean.TRUE);

on the label where you want to disable HTML rendering.

Reference: Impossible to disable HTML Rendering in a JLabel

---

For something like a JTable, JTree, or JList you'll need to create a custom cell renderer that sets this property. Here's an example (modified from this example) that creates a custom cell renderer for a JList.

import java.awt.Component;
import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.ListCellRenderer;

public class JListTest {
    public static void main(String[] args) {
        JFrame.setDefaultLookAndFeelDecorated(true);
        JFrame frame = new JFrame("JList Test");
        frame.setLayout(new FlowLayout());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        String[] selections = { "",
                "red", "orange", "dark blue" };
        JList list = new JList(selections);

        // set the list cell renderer to the custom class defined below
        list.setCellRenderer(new MyCellRenderer());

        list.setSelectedIndex(1);
        System.out.println(list.getSelectedValue());
        frame.add(new JScrollPane(list));
        frame.pack();

        frame.setVisible(true);
    }
}


class MyCellRenderer extends JLabel implements ListCellRenderer {
    public MyCellRenderer() {
        setOpaque(true);
        putClientProperty("html.disable", Boolean.TRUE);
    }

    public Component getListCellRendererComponent(
        JList list,
        Object value,
        int index,
        boolean isSelected,
        boolean cellHasFocus)
    {
        setText(value.toString());
        return this;
    }
}

I used the example code from the ListCellRenderer documentation as a starting point for the custom list cell renderer.

When I run the example, you can see that the HTML in the first list entry is rendered instead of being interpreted.