Initialization of array

Question

What is the problem with the following code?

class xyz
    {
      int[] array=new int[3];
      array[0]=0;
      array[1]=1;
      array[2]=2;

   public static void main(String[] args)
   {
   xyz a=new xyz();
   System.out.println(a.array[0]+" "+a.array[1]+" "+a.array[2]);
   }
  }

I am not able to initialize the array within the class but it works if it is initialized within a method of the class or the main function.

You can not randomly place code statements in the class, without them being in some method/constructor/block in Java. — Zabuzard, Jun 26 '18 at 16:03
I don't think that's a good duplicate; the issue isn't the initialization functionality, but where it's trying to live. — Dave Newton, Jun 26 '18 at 16:05

score 2 · Answer 1 · answered Jun 26 '18 at 16:03

2

The syntax to declare and initialize an array can be done in a single statement, like

int[] array = { 0, 1, 2 };

or you can use an initialization block. Like,

int[] array=new int[3];
{
    array[0]=0;
    array[1]=1;
    array[2]=2;
}

answered Jun 26 '18 at 16:03

Elliott Frisch

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1

Isn’t the second part of this not what OP has already, albeit outside of a method? – achAmháin Jun 26 '18 at 16:06
@notyou Yes, ***but*** OP's assignment statements **aren't** in an initialization block. – Elliott Frisch Jun 26 '18 at 16:08
yeah the OP is clearly trying to figure out how to make an instance of the object with a constructor doing the legwork for the array, I don't think this answer is what he was looking for – dave Jun 26 '18 at 16:08
Ah - I didn’t see that. – achAmháin Jun 26 '18 at 16:09
@aquaballin One distinction: an initialization block is **copied** into every constructor. So you would have to copy-and-paste this manually into every constructor for it to be equivalent. – Elliott Frisch Jun 26 '18 at 16:12

score 0 · Answer 2 · answered Jun 26 '18 at 16:15

0

array[0]=0;
array[1]=1;
array[2]=2;

This is not legal Java. Executable code must be inside a method or constructor.

answered Jun 26 '18 at 16:15

Code-Apprentice

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Initialization of array

2 Answers2