Question: I am displaying some text in a JLabel. Basically I am generating that text dynamically, and then I apply some HTML tags (e.g., `BR` and `B`) to format the text. Finally I assign this formatted text to my JLabel.

Now I want my Jlabel to automatically wrap the text to the next line when it reaches the end of screen, like the "Word Wrap" feature in Note Pad.

How can I do that?

Answer: 
A width can be set for the `body` using HTML styles (CSS). This in turn will determine the number of lines to render and, from that, the preferred height of the label.

Setting the width in CSS avoids the need to compute where line breaks should occur in (or the best size of) the label.

```
import javax.swing.*;

public class FixedWidthLabel {

    public static void main(String[] srgs) {
        final String s = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean eu nulla urna. Donec sit amet risus nisl, a porta enim. Quisque luctus, ligula eu scelerisque gravida, tellus quam vestibulum urna, ut aliquet sapien purus sed erat. Pellentesque consequat vehicula magna, eu aliquam magna interdum porttitor. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Sed sollicitudin sapien non leo tempus lobortis. Morbi semper auctor ipsum, a semper quam elementum a. Aliquam eget sem metus.";
        final String html = "<html><body style='width: %1spx'>%1s";

        Runnable r = () -> {
            JOptionPane.showMessageDialog(
                    null, String.format(html, 200, s));
            JOptionPane.showMessageDialog(
                    null, String.format(html, 300, s));
        };
        SwingUtilities.invokeLater(r);
    }
}

```

![enter image description here](https://i.stack.imgur.com/9tzxu.png) ![enter image description here](https://i.stack.imgur.com/9mfvE.png)
One way would be to use a `JTextArea` instead of a `JLabel` with `setWrapStyleWord` and `setLineWrap` set to true and with settings to make it look and behave like a `JLabel` (remove the border, make it non-opaque, make it non-editable and non-focusable). 

Otherwise if you absolutely need to use a `JLabel`, you'd be forced to use FontMetrics to measure your text, check for white-space, and then add the HTML hard-breaks in the appropriate positions yourself.