Passing arrays as function parameter in java

msi_333 · **Posted:** Sun Aug 09, 2009 10:29 pm

You have to knew 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 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 x = null
    }

    public byte[] calc (byte[] arr)
    {
arr = new byte[3];
        //do something here. 
        return arr; 
        
    }

Passing arrays as function parameter in java

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