var args

main.java

package com.alex.methods;

class VarArgs {

    public static void sum(int[] ar) {
        int s = 0;
        for (int current : ar) {
            s += current;
        }
        System.out.println(s);
    }

    public static void summa(int... args) {
        int s = 0;
        for (int current : args) {
            s += current;
        }
        System.out.println(s);
    }

    public static void main(String[] args) {
        sum(new int[]{1, 2, 3, 4, 5});
        summa(1, 2, 3, 4, 5);
    }
}