java——大数加法减法乘法

import java.math.BigInteger;
public class Main {
public static void main(String[] args) {
String num1 = "999999999999999999999999999999";
String num2 = "999999999999999999999999999998";
BigInteger big1 = new BigInteger(num1);
BigInteger big2 = new BigInteger(num2);
System.out.println("加法操作:" + big1.add(big2));
System.out.println("减法操作:" + big1.subtract(big2));
System.out.println("乘法操作:" + big1.multiply(big2));
BigInteger result[] = big1.divideAndRemainder(big2);
System.out.println("相除后的商是:" + result[0]);
System.out.println("相除后的余数是:" + result[1]);
}