From JPanel to DOS

Question

Hello all,
I have a program that runs from DOS by typing "java myProgram" which calls a JFrame class "myClass" that implements some button actions.
Is it possible to create a new JButton("Return to DOS") with an action that closes the current frame window and returns to the DOS prompt from where we ran the "java myProgram" command?
Thanks as usual for your help!

Answer 1

OK maybe with some code the picture is more clear...
So let's say I have 2 classes, 'DrawRectangle' and 'menu' as follows:
import java.awt.geom.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class DrawRectangle extends JPanel implements ActionListener
   Rectangle2D.Float rectangle2D;
   protected JButton menu;
   public DrawRectangle()
       //PS: I know that the following should not be in the constructor.
       //This is just a sample example.
       rectangle2D = new Rectangle2D.Float(50F,50F,200,200);
       menu = new JButton("Return to DOS menu");
       add(menu);
       menu.addActionListener(this);
   public void actionPerformed(ActionEvent e)
      if (e.getSource() == menu)
         System.exit(0);           
   public void paint(Graphics g)
       Graphics2D g2 = (Graphics2D)g;
       g2.setPaint(Color.blue);
       g2.draw(rectangle2D);      
    public static void main ()
       JFrame rectangle = new JFrame("My Project");
       rectangle.setSize(400, 400);     
       Container container = rectangle.getContentPane();              
       container.add(new DrawRectangle());      
       rectangle.setVisible(true);      
import java.io.*;
class menu
    menu()
       int choice = -1;
       while (choice != 0)
          System.out.println("Please choose an option from 1 to 4, 0 to exit\n");
          BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
          try
             choice = Integer.parseInt(in.readLine());
             switch(choice)
                case 1: choice1(); break;
                case 2: choice2(); break;
                case 3: choice3(); break;
                case 4: choice4(); break;
          catch (Exception ex)
       System.out.println("Exit");       
   private void choice1()
       new DrawRectangle().main();
   private void choice2()
       System.out.println("Choice 2");
   private void choice3()
       System.out.println("Choice 3");      
   private void choice4()
       System.out.println("Choice 4");      
   public static void main(String [] args)
       new menu();
}Now just to explain, I open a DOS prompt, type 'java menu' and you have four options: 1,2,3,4 and 0 to exit. If you type 2, the system returns "Choice 2" and you can choose another option (which is what I want). If you type 1, the system calls the main method of class 'DrawRectangle' and a JFrame with a painted rectangle opens up. When I click the "Return to DOS menu" button, the JFrame closes and the DOS window is active again. However, the DOS goes on C:\ prompt and not on "Please choose an option from 1 to 4, 0 to exit" as I want. And you have to type again 'java menu' to run the program. Instead, any other option like 2,3 or 4 will give you the chance to choose another option.
I know that all this sound strange to you, but unfortunately the requirements given to me is to run the program from a DOS prompt and to be able to choose another option without the need of typing again 'java menu'.
Thanks for your help and attention.