public class Main extends JFrame { public Main() {
GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment(); this.setExtendedState(this.getExtendedState() | this.MAXIMIZED_BOTH);
}
public static void main(String[] args) {
JFrame.setDefaultLookAndFeelDecorated(true);
Main t = new Main();
t.setVisible(true);
}
}