Passing arrays as function parameter in java

Sun Aug 09, 2009 10:29 pm

You should be able to see the difference between passing the array as parameter in following two cases :
1. Assigning objects to the array of reference before the calling of function: .

Code:: public static void main(String[] args) { byte[] arr=new byte[3]; byte[] x= calc(arr); // in this case x = arr ( not null); } public static byte[] calc (byte[] arr) { //do something here. return arr; }

2. Assigning objects to the array of references in the called of function:

Code:: public static void main(String[] args) { byte[] arr = null; byte[] x = calc(arr); // in this case arr = null System.out.println(x.length); System.out.println(arr); } public static byte[] calc(byte[] arr) { arr = new byte[3]; //do something here. return arr; }

The output of the second code snippet is :

Code:: 3 null

You notice that the reference "arr" is still null in the main function

Sun Oct 21, 2012 1:38 pm

updated.

Passing arrays as function parameter in java

Passing arrays as function parameter in java

Re: Passing arrays as function parameter in java

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