1 public BigInteger add(BigInteger val)：加
2 public BigInteger subtract(BigInteger val)：减
3 public BigInteger multiply(BigInteger val)：乘
4 public BigInteger divide(BigInteger val)：除
5 public BigInteger divideAndRemainder(BigInteger val)：返回 商 和 余数的数组

 1 package cn.itcast_02;
 2
 3 import java.math.BigInteger;
 4
 5 /*
 6  * public BigInteger add(BigInteger val):加
 7  * public BigInteger subtract(BigInteger val):减
 8  * public BigInteger multiply(BigInteger val):乘
 9  * public BigInteger divide(BigInteger val):除
10  * public BigInteger[] divideAndRemainder(BigInteger val):返回商和余数的数组
11  */
12 public class BigIntegerDemo {
13     public static void main(String[] args) {
14         BigInteger bi1 = new BigInteger("100");
15         BigInteger bi2 = new BigInteger("50");
16
17         // public BigInteger add(BigInteger val):加
18         System.out.println("add:" + bi1.add(bi2));
19         // public BigInteger subtract(BigInteger val):加
20         System.out.println("subtract:" + bi1.subtract(bi2));
21         // public BigInteger multiply(BigInteger val):加
22         System.out.println("multiply:" + bi1.multiply(bi2));
23         // public BigInteger divide(BigInteger val):加
24         System.out.println("divide:" + bi1.divide(bi2));
25
26         // public BigInteger[] divideAndRemainder(BigInteger val):返回商和余数的数组
27         BigInteger[] bis = bi1.divideAndRemainder(bi2);
28         System.out.println("商：" + bis[0]);
29         System.out.println("余数：" + bis[1]);
30     }
31 }