java - JAVA中的大数相乘

Question

我试图通过添加扫描仪来获取用户输入来做到这一点，但我做不到。您通过添加 Scanner 来获取用户输入来帮助我改进此代码。我尝试了一下，但出现了一些错误。我是JAVA语言的初学者。

import java.math.*;

public class BigIntegerMul {

public static void main(String args[]) {

    BigInteger int1 = new BigInteger("131224324234234234234313");
    BigInteger int2 = new BigInteger("13345663456346435648234313");
    BigInteger result = int1.multiply(int2);
    System.out.println(result);

}
}

Answer 1

要使用 Scanner 获取 BigInteger，您可以使用以下代码片段 -

import java.math.*;
import java.util.Scanner;

public class BigIntegerMul {

public static void main(String args[]) {

    //BigInteger int1 = new BigInteger("131224324234234234234313");
    //BigInteger int2 = new BigInteger("13345663456346435648234313");

    BigInteger int1, int2, result; 
    Scanner sc = new Scanner(System.in);

    System.out.println("Enter first bigInteger: ");
    int1 = sc.nextBigInteger();

    System.out.println("Enter second bigInteger: ");
    int2 = sc.nextBigInteger();

    result = int1.multiply(int2);

    System.out.println("Result: " +result);

 }
}