Arrays
More skills
Assignment operators

Here are listA and listB

listB = listA;

for (int index=0; index<listA.length; index++)
	listB[index] = listA[index];

if (listA == listB)...

The expression listA == listB determines if the values of listA and listB are the same and thus determines whether listA and listB refer to the same array
To determine whether listA and listB contain the same elements, you need to compare them component by component
You can write a method that returns true if two int arrays contain the same elements

boolean areEqualArrays(int[] firstArray,
                      int[] secondArray)
{
    if (firstArray.length != secondArray.length)
        return false;

    for (int index = 0; index < firstArray.length;
                        index++)
        if (firstArray[index] != secondArray[index])
            return false;
    return true;
}

if (areEqualArrays(listA, listB))
...