java 判断返回值的类型

举例：判断返回值是否是枚举值类型
public class Test {
   
     public enum ColorSelect {
         red, green, yellow, blue;    
    }
 private static ColorSelect getE()
 {
  ColorSelect c=ColorSelect.blue;
  return c;
 }
 public static void main(String[] args) {    
  Object o=getE();
  if(o instanceof  Enum)
  {
   System.out.println(o);
  }
        }
}