Java Math byteValueExact() 方法

package com.codingdict;



import java.math.*;



public class BigDecimalDemo {



   public static void main(String[] args) {



      // create 2 BigDecimal objects

      BigDecimal bg1, bg2;



      // Create 2 byte objects

      byte i1, i2;



      // assign values to bg1 and bg2

      bg1 = new BigDecimal("-128");

      bg2 = new BigDecimal("48");



      // any BigDecimal value greater than 127 or less than -128,

      // will generate exception as it doesn't fit in byte range



      // this   method also generates exception for decimal values like 12.10



      // assign the byte value of bg1 and bg2 to i1,i2 respectively

      i1 = bg1.byteValueExact();

      i2 = bg2.byteValueExact();



      String str1 = "Exact byte value of " + bg1 + " is " + i1;

      String str2 = "Exact byte value of " + bg2 + " is " + i2;



      // print i1,i2 values

      System.out.println( str1 );

      System.out.println( str2 );

   }

}