Anonymous

import java.awt.Dimension;import javax.swing.JFrame;import javax.swing.SwingUtilities;class Test {    public static void main (String[] args) {        SwingUtilities.invokeLater (new Runnable () {            public void run () {                new Gui ();            }        });    }}class Gui {    JFrame f;    public Gui () {        f = new JFrame ();        f.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);        f.setPreferredSize (new Dimension (100, 100));        f.pack ();        f.setVisible (true);    }    public boolean isVisible () {        return f.isVisible ();    }}