JAVA sample Program MENU

import javax.swing.*;
class Juan
{
    public static void main(String [] args)
    {
        int pil;
        do
        {
            pil = Integer.parseInt(JOptionPane.showInputDialog
            ("---MENU---\n1.Input\n2.Output\n3.Exit"));
            switch(pil)
            {
                case 1:
                    System.out.println("Anda Pilih 1");
                break;
                case 2:
                    System.out.println("Anda Pilih 2");
                break;
                case 3:
                    System.exit(0);
                break;
                default : System.out.println("Pilihan hanya 1, 2, 3");
            }  
        }
        while(pil !=3);
    }
}