JDialog dialog = new JDialog(new Frame(),
		                              "Click a button",
		                              true);
		 dialog.setContentPane(new JButton("Click Me"));
		 dialog.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
		 dialog.addWindowListener(new WindowAdapter() {
		     public void windowClosing(WindowEvent we) {
		         System.exit(0);
		     }
		 });
		 dialog.setSize(100,50);
		 Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
      	 dialog.setLocation((screenSize.width - 100) / 2, (screenSize.height - 50) / 2);
		 dialog.setVisible(true);
 

		JTextField tName= new JTextField(15);
		JLabel lName = new JLabel("Enter the Name");
 
		JFrame f = new JFrame("Creating PriceSheet");
		f.getContentPane().setLayout(new BorderLayout());
		JDialog dialog = new JDialog(f);
 
		f.getContentPane().add(lName,BorderLayout.WEST);
		f.getContentPane( ).add(tName,BorderLayout.EAST);
		
		dialog.setContentPane(f.getContentPane());
 
		dialog.setDefaultCloseOperation( JDialog.DO_NOTHING_ON_CLOSE);
		dialog.addWindowListener(new WindowAdapter()
		{public void windowClosing(WindowEvent we)
		{ System.exit(0);
		}
		});
		
	    dialog.setSize(300,50);
		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
		dialog.setLocation((screenSize.width - 300) / 2, (screenSize.height - 50) / 2);
		dialog.setVisible(true);
 
//check
//I did dialog.setContentPane(f.getContentPane());
//Instead of dialog.setContentPane(f);