API_project/BigInteger_module/src/BigInteger_demo2.java

import java.math.BigInteger;

public class BigInteger_demo2 {
    public static void main(String[] args) {
        /*
        public BigInteger add (BigInteger val)                          加法
        public BigInteger subtract (BigInteger val)                     减法
        public BigInteger multiply (BigInteger val)                     乘法
        public BigInteger divide (BigInteger val)                       除法，获取商
        public BigInteger[] divideAndRemainder (BigInteger val)         除法，获取商和余数
        public boolean equals (Object x)                                比较是否相同
        public BigInteger pow (int exponent)                            次幂
        public BigInteger max/min (BigInteger val)                      返回较大值/较小值
        public int intValue (BigInteger val)                            转为int类型整数，超出范围数据有误
         */

        //1、创建两个BigInteger对象
        BigInteger bd1 = BigInteger.valueOf(10);
        BigInteger bd2 = BigInteger.valueOf(3);

        //2、加法
        BigInteger bd3 = bd1.add(bd2);
        System.out.println(bd3);

        //3、除法，获取商和余数
        BigInteger[] arr = bd1.divideAndRemainder(bd2);
        System.out.println(arr.length);
        System.out.println(arr[0]);
        System.out.println(arr[1]);

        //4、比较是否相同
        boolean result = bd1.equals(bd2);
        System.out.println(result);

        //5、次幂
        BigInteger bd4 = bd1.pow(2);
        System.out.println(bd4);

        //6、max
        BigInteger bd5 = bd1.max(bd2);
        System.out.println(bd5 == bd1);//true
        System.out.println(bd5 == bd2);//false

        //7、转为int类型整数，超出范围数据有误
        int i = bd1.intValue();
        System.out.println(i);

        long l = bd5.longValue();
        System.out.println(l);

        double v = bd5.doubleValue();
        System.out.println(v);


    }
}