Java BigInteger类

 1 package demo04;
 2
 3 import java.math.BigInteger;
 4
 5 //超过long型的整数, 封装成BigInteger类型的对象
 6 public class BigIntegerDemo {
 7     public static void main(String[] args) {
 8         //构造方法
 9         BigInteger b = new BigInteger("11111111111111111111111111111111111111111111");
10         System.out.println(b);
11
12         BigInteger b1 = new BigInteger("111111111111111111111111");
13         BigInteger b2 = new BigInteger("222222222222222222222222");
14
15         //加
16         BigInteger bigadd = b1.add(b2);
17         System.out.println(bigadd);
18
19         //减
20         BigInteger bigsub = b2.subtract(b1);
21         System.out.println(bigsub);
22
23         //乘
24         BigInteger bigmul = b1.multiply(b2);
25         System.out.println(bigmul);
26
27         //除
28         BigInteger bigdiv = b2.divide(b1);
29         System.out.println(bigdiv);
30
31     }
32 }