Java tutorial
import java.awt.Dialog; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JFrame; public class Main { public static void main(String[] args) { final JFrame parent1 = new JFrame("Parent Frame 1"); parent1.setLayout(new FlowLayout()); parent1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JButton button = new JButton("Application modal dialog"); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JDialog dialog = new JDialog(parent1, "Application-Modal Dialog", Dialog.ModalityType.APPLICATION_MODAL); dialog.setBounds(200, 150, 200, 150); dialog.setVisible(true); } }); parent1.add(button); parent1.setBounds(100, 100, 200, 150); parent1.setVisible(true); JFrame parent2 = new JFrame("Parent Frame 2"); parent2.setBounds(500, 100, 200, 150); parent2.setVisible(true); } }