how to add this code to BEAN SHELL SCRIPT

import javax.swing.JFrame;
import javax.swing.JOptionPane;
 
public class ShowMessageDialogExample1
{
  public static void main(String\[\] args)
  {    String backupDir = "/Users/al/backups";         // create a jframe    JFrame frame = new JFrame("JOptionPane showMessageDialog example");         // show a joptionpane dialog using showMessageDialog    JOptionPane.showMessageDialog(frame,        "Problem writing to backup directory: '" + backupDir + "'.");    System.exit(0);  }
}