Java spread operator

Question

I am not sure of the vocabulary I am using here, please correct me if I\'m wrong.

In Javascript, I had the following code:

let args = [1,2,3];

func         


        

Answer 1

Contrary to numerous comments, e.g. by @JoeC and @Henry, and incorrect answers, this is possible in Java.

I'd like to use something like

doSomething (...args)

instead of calling doSomething(args[0], args[1], args[2]).

You need:

public int doSomething (int ... args) {
    int sum = 0;
    for (int i : args)
    {
        sum += i;
    }
    return sum;
}

I'd like not to change the implementation of such a function.

Impossible, a priori. Either you are adding exactly three arguments, or as many arguments as were actually passed. Make up your mind about this.