Can somebody help me Understand Arrays in Java better?

Question

I don't understand anything about arrays in Java because this array lesson was not simply and it is really confusing. And for that reason I can't continue with the leaning. I'm stacked here. can somebody simplify this java Array lesson for me ?

Answer 1

Okay, an array is a BUNCH of variables.
However, all variables in the array are of the type of the array.

For example,

int[] array1 = {5,2,3,6};

Notice that everything in the array is an int. This is because I said "int[]" meaning, an array of type int.

So, the following would cause an error:

int[] array2 = {"A string!", 5, 3};

Now, moving on to some terminology:

Each ITEM in the array is called an element.
Each element contains some data (Or, the elements value). This is what's in the array.

For example,

int[] array3 = {1,2,3};
// 1 2 and 3 are the elements

Now, this is important:
The location of each element is called the Index.
(Originally defined as: The distance from the starting point in the array).

To access or modify an element, you can use this index.
ALL ARRAYS BEGIN AT THE INDEX 0.

Example/
int[] array4 = {5,7,9,0};

The index's are like this:

value: 5 7 9 0
index: 0 1 2 3

System.out.println(array4[2])
// Output: 9

So, we use the syntax:
myArrayName[index] to get or modify the element at that index in the array.