Overridden ArrayList methods

[FkordJava]

No description provided.

[sokimaaa]

this method is not expected to be used outside this class, so make private.
don't forget to move it at the end of class, because of private.

Suggested change

	public void indexValidator(int index) {
	if (index < 0 || index >= size) {
	throw new ArrayListIndexOutOfBoundsException("Index is not valid");
	}
	}
	private void indexValidator(int index) {
	if (index < 0 || index >= size) {
	throw new ArrayListIndexOutOfBoundsException("Index is not valid");
	}
	}

[sokimaaa]

You dont need to set size=0, because java makes the same instead of you.

Suggested change

this.size = 0;

[sokimaaa]

Think about proper access modifier for grow method.

[sokimaaa]

Method grow should be void, because it changes the main array, e.g. this.elementData.
So, you can directly access this this.elementData.

Suggested change

	public Object[] grow(T[] elementData, int size) {
	public void grow(T[] elementData, int size) {

[sokimaaa]

Potentially repeating code should be extracted into private method.

Suggested change

	if (index < 0 || index > size) {
	throw new ArrayListIndexOutOfBoundsException("Index is not valid");
	}
	if (index < 0 || index > size) {
	throw new ArrayListIndexOutOfBoundsException("Index is not valid");
	}

[kerrrusha]

binary operators reduces code readability. consider creating GROWTH_FACTOR = 1.5 constant

Suggested change

	int newCapacity = elementData.length + (elementData.length >> 1);
	int newCapacity = elementData.length * GROWTH_FACTOR;

[kerrrusha]

can be more simple

Suggested change

	if (element == null) {
	for (int i = 0; i < size; i++) {
	if (elementData[i] == null) {
	return remove(i);
	}
	}
	} else {
	for (int i = 0; i < size; i++) {
	if (element.equals(elementData[i])) {
	return remove(i);
	}
	}
	}
	throw new NoSuchElementException("Element not found");
	for (int i = 0; i < size; i++) {
	if (element == null ? elementData[i] == null : element.equals(elementData[i])) {
	return remove(i);
	}
	}
	throw new NoSuchElementException("Element not found");

[kerrrusha]