List及数组中 contains的用法

String flag;
1.判断list中是否包含某个字符串
List<String> menuTreeTypes = proMenuService.getMenuTreeTypes(emp.getEmpId());
boolean contains = menuTreeTypes.contains(flag);
2.判断数组中是否包含某个字符串
String[] empTypes = empType.split(",");
boolean contains = Arrays.asList(empTypes).contains(flag);