what do the square brackets mean? in Java

Question

What does it mean when there are square brackets in front of double. For example double[]? Is there any special way to use the return function when using them in a method.

For example:

public double[] MethodName(){

}

What is the type of the return value?

it's called an `Array`. http://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html — EpicPandaForce, Oct 23 '14 at 21:50
It's for arrays. You need to create an array to return (or return null) for that method. Ex. `return new double[10];` — But I'm Not A Wrapper Class, Oct 23 '14 at 21:51

12341234 · Accepted Answer · 2014-10-23T22:00:55.730

17

Square brackets [] would indicate an array. In your case of code:

public double[] MethodName(){ .... }

You have a public method MethodName which returns an array. Double indicates what type the array is, i.e. stores an array of objects of type double.

EDIT: Forgot about answering your return question. But for your line of code, MethodName would return an array of type double (which would depend on the implmentation inside the method body). Hope that helps (I'm new to Java too; climbing the SO rep ladder)

edited Oct 23 '14 at 22:00

answered Oct 23 '14 at 21:52

12341234

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Anything else that needs answering? I want to have that green tick checked :) – 12341234 Oct 23 '14 at 22:08

what do the square brackets mean? in Java

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