Java Math BigInteger.subtract() 方法

package com.codingdict;



import java.math.*;



public class BigIntegerDemo {



   public static void main(String[] args) {



      // create 3 BigInteger objects

      BigInteger bi1, bi2, bi3;



      bi1 = new BigInteger("123");

      bi2 = new BigInteger("-123");



      // assign difference of bi1 and bi2 to bi3

      bi3 = bi1.subtract(bi2);



      String str = "Subtraction result: " +bi1+ " - " +bi2+ " = " +bi3;



      // print bi3 value

      System.out.println( str );

   }

}