Java tutorial
import javax.swing.JDialog; import javax.swing.JFrame; public class Main { JFrame frame = new JFrame(); JDialog dialog = new JDialog(); public Main() { frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(400, 300); frame.setVisible(true); dialog = new JDialog(frame, true); dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE); dialog.setModal(true); dialog.setSize(300, 200); dialog.setVisible(true); } public static void main(String args[]) { Main dialog = new Main(); } }