如何在java中对Scanner生成的值进行算术运算？

import java.util.Scanner;

public class ArithmeticOperations {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("请输入第一个数：");
        int num1 = scanner.nextInt();

        System.out.print("请输入第二个数：");
        int num2 = scanner.nextInt();

        int sum = num1 + num2;
        int difference = num1 - num2;
        int product = num1 * num2;
        double quotient = (double) num1 / num2;

        System.out.println("两数之和：" + sum);
        System.out.println("两数之差：" + difference);
        System.out.println("两数之积：" + product);
        System.out.println("两数之商：" + quotient);

        scanner.close();
    }
}