java 鼠标右击菜单JPopupMenu中 JMenuItem 子菜单怎么实现
JPopupMenu mainpopupMenu=new JPopupMenu();
JMenuItem item1=new myMenuItem("搜索好友");
mainpopupMenu.add(item1);
if(evt.isPopupTrigger()){
mainpopupMenu.setLocation(evt.getX(),evt.getY());
mainpopupMenu.show(evt.getComponent(),evt.getX(),evt.getY());
}
现item1 想再接子菜单???? 而且item1子菜单 怎么显示,点击事件
给个大体实现吧 谢谢了