Member Avatar for nadiam

Hi. I have these exercises to do, to write the output of some coding given. I can compile it in eclipse but doesn't mean i understand. can someone please explain this code to me. thank you.

int[] arrayA = new int[3]; //this part i know, create array size 3 int[] arrayB = arrayA;//from here i don't really understand. is this like create an array and put the first array in it? why would you do that? arrayB[0] = 19;//from here is to put value in each node arrayB[1] = 2; arrayB[2] = 35; for(int element: arrayA) System.out.println(element);
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  • Latest Post Latest Post by JamesCherrill
Member Avatar for JamesCherrill

To understand this you need to remember:

int[] arrayA = ... creates a reference variable arrayAthat holds a pointer to an array
new int[3] creates an actuial array of 3 elements
so int[] arrayA = new int[3]; creates an array and creates a pointer to it.

line 2 creates a reference variable (pointer) called arrayB, but it does NOT create a new array. It sets the pointer to refer to the existing array that was created on line 1

Member Avatar for nadiam

Okayy.. what about for(int element: arrayA) ? it "grabs" the elements in the array?

Member Avatar for JamesCherrill

Yes.. it iterates through the array for you. it's called an "enhanced for loop". Google for details & examples.

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