e809. separating menu items in a menu.txt

这里面包含了一百多个JAVA源文件

A separator typically appears as a horizontal line. It is used to group related sets of menu items in a menu. 
    // Create a menu
    JMenu menu = new JMenu("Menu Label");
    
    // Add a menu item
    JMenuItem item1 = new JMenuItem("Item Label");
    menu.add(item1);
    
    // Add separator
    menu.add(new JSeparator());
    
    // Add another menu item
    JMenuItem item2 = new JMenuItem("Item Label");
    menu.add(item2);