Use an array without declaring it in a variable

Question

If you try to do 15/2 it will return 7 because it thinks that 15 and 2 are integers. If you do (double)15/2 it will return 7.5 because it knows that 15 is a double.

Say you have a function named test() that takes in an array as an argument. How would you pass an array into the function without defining it first?

I have tried doing something like this:

test((int[]){1,2,3,4})

Robby Cornelissen · Accepted Answer · 2017-06-21 03:46:49Z

4

You're pretty close. You can do it like this:

test(new int[]{1, 2, 3, 4});

answered Jun 21, 2017 at 3:46

Robby Cornelissen

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Comments

Elliott Frisch · Accepted Answer · 2017-06-21 03:51:55Z

2

I think you are looking for a variadic function (aka varargs), something like

public static double test(int... vals) {
    return IntStream.of(vals).sum() / (double) vals.length;
}

can be called with any number of int(s). For example,

System.out.println(test(1, 2, 3));

Which outputs

2.0

answered Jun 21, 2017 at 3:51

Elliott Frisch

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