JButton advancedB = new JButton ( " Advanced " );
    JMenu buttonMenu = new JMenu ( " Advanced " );
        JMenuItem advanced4 = mew JMenuItem ( " << 4 " );
        JMenuItem advanced6 = mew JMenuItem ( " << 6" );
        JMenuItem advanced8 = mew JMenuItem ( " << 8" );
    buttonMenu.add ( advabced4 );
    buttonMenu.add ( advabced6 );
    buttonMenu.add ( advabced8 );
advanceB.add ( buttonMenu );