Example: initials of a name read using a dialog window

import javax.swing.JOptionPane;

public class Initials {
  public static void main (String[] args) {
    String fn = JOptionPane.showInputDialog("Insert first name");
    String ln = JOptionPane.showInputDialog("Insert surname");
    String ifn = fn.substring(0,1).toUpperCase();
    String iln = ln.substring(0,1).toUpperCase();
    System.out.println("Name: " + fn + " " + ln);
    System.out.println("Initials: " + ifn + iln);
    System.exit(0);
  }
}