Java tutorial
import java.awt.Window; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.SwingUtilities; public class Main { public static void main(String[] args) { JFrame frame = new JFrame(Main.class.getSimpleName()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final JButton button = new JButton("Click me to open dialog"); button.addActionListener(e -> { Window parentWindow = SwingUtilities.windowForComponent(button); JDialog dialog = new JDialog(parentWindow); dialog.setLocationRelativeTo(button); dialog.setModal(true); dialog.add(new JLabel("A dialog")); dialog.pack(); dialog.setVisible(true); }); frame.add(button); frame.pack(); frame.setVisible(true); } }