Java.math.RoundingMode 枚举

public enum RoundingMode
   extends Enum

package com.tutorialspoint;

import java.math.*;

public class RoundingModeDemo {

   public static void main(String[] args) {

      // create 2 RoundingMode objects
      RoundingMode rm1, rm2;

      // create and assign values to rm and name
      int rm = 5;
      String name = "UP";

      // static methods are called using enum name

      // assign the the enum constant of rm to rm1
      rm1 = RoundingMode.valueOf(rm);

      // assign the the enum constant of name to rm2
      rm2 = RoundingMode.valueOf(name);

      String str1 = "Enum constant for integer " + rm + " is " +rm1;
      String str2 = "Enum constant for string " + name + " is " +rm2;

      // print rm1, rm2  values
      System.out.println( str1 );
      System.out.println( str2 );

      String str3 = "Enum constants of RoundingMode in order are :";

      System.out.println( str3 );

      // print the array of enum constatnts using for loop
      for (RoundingMode c : RoundingMode.values())
      System.out.println(c);
   }
}

Enum constant for integer 5 is HALF_DOWN
Enum constant for string UP is UP
Enum constants of RoundingMode in order are :
UP
DOWN
CEILING
FLOOR
HALF_UP
HALF_DOWN
HALF_EVEN
UNNECESSARY