nonenum.java

java编程思想(第四版)书中原代码 ,对初学者很有用的东西

//: enumerated/NonEnum.java

public class NonEnum {
  public static void main(String[] args) {
    Class<Integer> intClass = Integer.class;
    try {
      for(Object en : intClass.getEnumConstants())
        System.out.println(en);
    } catch(Exception e) {
      System.out.println(e);
    }
  }
} /* Output:
java.lang.NullPointerException
*///:~