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import javax.swing.JDialog;
import javax.swing.JOptionPane;
public class MainClass {
public static void main(String[] a) {
String msg = "<html>this is a really long message<br>this is a really long message this is a really long message this is a really long message this is a really long message this is a really long message this is a really long message";
JOptionPane optionPane = new NarrowOptionPane();
optionPane.setMessage(msg);
optionPane.setMessageType(JOptionPane.INFORMATION_MESSAGE);
JDialog dialog = optionPane.createDialog(null, "Width 100");
dialog.setVisible(true);
}
}
class NarrowOptionPane extends JOptionPane {
NarrowOptionPane() {
}
public int getMaxCharactersPerLineCount() {
return 100;
}
}
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