Return array from method - java

Question

private static Coordinate[] getCircleCoordintaes() {  
  Coordinate coordinates[] = {new Coordinate(0, 0)};
  return coordinates;   
}

Above program working fine. In the above program for return the coordinate array first initialized the array using this line

Coordinate coordinates[] = {new Coordinate(0, 0)};

and then return coordinates.

But when I try to return directly below line then got exception.

{new Coordinate(0, 0)}

Actually I am trying to find a way to return coordinate array directly. I want to skip the assigning step. May be I am doing something wrong.

How to return this array directly? Any suggestion?

return new Coordinate[] {new Coordinate(0, 0)};? If you want help resolving the exception then you need to tell us exactly what the exception was... — JonK
– JonK, Commented Sep 28, 2015 at 13:20

Bohuslav Burghardt · Accepted Answer · 2015-09-28 13:29:25Z

10

return new Coordinate[] { new Coordinate(0, 0) }

To elaborate, the construct you are using ({new Coordinate(0, 0)};) is called Array initilizer and as per JLS can be used only in declaration or as part of Array creation expression.

An array initializer may be specified in a declaration (§8.3, §9.3, §14.4), or as part of an array creation expression (§15.10), to create an array and provide some initial values.
ArrayInitializer:
    { VariableInitializersopt ,opt }

edited Sep 28, 2015 at 13:29

answered Sep 28, 2015 at 13:20

Bohuslav Burghardt

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2 Comments

Ankush soni Over a year ago

why return new Coordinate[] { new Coordinate(0, 0) } ? you are creating uncessary object, we can achevie this by return new Coordinate[]{0, 0};

Bohuslav Burghardt Over a year ago

@Ankushsoni You are creating and returning array of Coordinate objects in your example (assume that it is object holding x and y) properties. But this new Coordinate[]{0, 0} attempts to create Coordinate array and assign it two int values (0). Therefore this piece of code will not compile.

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