java学习first_day

java枚举

 

 

 

 

public class EnumMethodDemo {

  enum Color {RED, GREEN, BLUE;}

  enum Size {BIG, MIDDLE, SMALL;}

  public static void main(String args[]) {

   System.out.println("=========== Print all Color ===========");    //// =========== Print all Color ===========                

    for (Color c : Color.values()) {                     RED ordinal: GREEN ordinal: BLUE ordinal: 2      

      System.out.println(c + " ordinal: " + c.ordinal());

    }

     System.out.println("=========== Print all Size ===========");

    for (Size s : Size.values()) {

      System.out.println(s + " ordinal: " + s.ordinal());

    }

    Color green = Color.GREEN;

    System.out.println("green name(): " + green.name());

    System.out.println("green getDeclaringClass(): " + green.getDeclaringClass());

    System.out.println("green hashCode(): " + green.hashCode());

    System.out.println("green compareTo Color.GREEN: " + green.compareTo(Color.GREEN));

    System.out.println("green equals Color.GREEN: " + green.equals(Color.GREEN));

    System.out.println("green equals Size.MIDDLE: " + green.equals(Size.MIDDLE));

    System.out.println("green equals 1: " + green.equals(1));

    System.out.format("green == Color.BLUE: %b\n", green == Color.BLUE); } }

posted @ 2020-02-19 13:11  王亚博客  阅读(182)  评论(0编辑  收藏  举报