Can't Java GUI to look the way I want...?

Question just wants the GUI to look like this:

Here's the code I have

import javax.swing.JOptionPane;

class Customer
  {

    String n = JOptionPane.showInputDialog("Enter name");
    String id = JOptionPane.showInputDialog("Enter id");
    String sub = JOptionPane.showInputDialog("Enter Submit");

JOptionPane.showMessageDialog(null, null, null, JOptionPane.PLAIN_MESSAGE)

  }

}

I want it everything to look horizontal

Enter Name         [box to fill in name]

Enter id            [box to fill in id]

Submit              [box to enter submit]