看到大佬都是用C++写的，用的unsigned long long, 但是Java怎么实现呢？

下边是我的代码

import java.util.*;

public class Main {
    private static Main instance;
    private Scanner scanner;

    private long n, total;

    public Main() {
        scanner = new Scanner(System.in);
        n = scanner.nextLong();
        total = n * (n - 1) / 2 * (n - 2) / 3 * (n - 3) / 4;
        System.out.printf("%d\n", total);
    }

    public static void main(String[] args) {
        instance = new Main();
    }
}