JFrame多屏显示

public static void showOnScreen( int screen, JFrame frame ){    GraphicsEnvironment ge = GraphicsEnvironment        .getLocalGraphicsEnvironment();    GraphicsDevice[] gs = ge.getScreenDevices();    if( screen > -1 && screen < gs.length )    {        gs[screen].setFullScreenWindow( frame );    }    else if( gs.length > 0 )    {        gs[0].setFullScreenWindow( frame );    }    else    {        throw new RuntimeException( "No Screens Found" );    }}