java biginteger怎么用

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
/**
 * BigInteger类
 *    可以让超过Integer范围内的数据进行运算
 * 构造方法
 *    public BigInteger(String val)
 * 成员方法
 *    public BigInteger add(BigInteger val)
 *    public BigInteger subtract(BigInteger val)
 *    public BigInteger multiply(BigInteger val)
 *    public BigInteger divide(BigInteger val)
 *    public BigInteger[] divideAndRemainder(BigInteger val) 返回的第一个值为商 第二个值位余数
 */
public class BigIntegerDemo {
    public static void main(String[] args) {
        BigInteger b1 = new BigInteger("100");
        BigInteger b2 = new BigInteger("200");
         
        //public BigInteger add(BigInteger val)
        System.out.println(b1.add(b2));//300
        System.out.println(b1.add(b2));//300
        System.out.println(b1.add(b2));//300
        System.out.println(b1.add(b2));//300
         
        //public BigInteger subtract(BigInteger val)
        System.out.println(b1.subtract(b2));//-100
         
        //public BigInteger multiply(BigInteger val)
        System.out.println(b1.multiply(b2));//20000
         
        //public BigInteger divide(BigInteger val)
        System.out.println(b1.divide(b2));//0
         
        //  public BigInteger[] divideAndRemainder(BigInteger val)
        BigInteger[] bis = b1.divideAndRemainder(b2);
        System.out.println(bis[0]);//0
        System.out.println(bis[1]);//100
    }
}
全文：http://www.androidstar.cn/java-biginteger怎么用/