Java tutorial
import java.awt.Frame; import java.awt.Window; import javax.swing.JDialog; import javax.swing.JFrame; public class MainClass { public static void main(String[] args) { JDialog d1 = new JDialog((JFrame) null, "Dialog 1"); d1.setName("Dialog 1"); JDialog d2 = new JDialog((Window) null, "Dialog 2"); d2.setName("Dialog 2"); Frame f = new Frame(); f.setName("Frame 1"); Window w1 = new Window(f); w1.setName("Window 1"); Window w2 = new Window(null); w2.setName("Window 2"); Window[] ownerlessWindows = Window.getOwnerlessWindows(); for (Window window : ownerlessWindows) System.out.println(window.getName() + ": " + window.getClass()); } }