Operator Precedence

First order

!, ++, --

Second Order

*, /, %

Third Order

+, -

Fourth Order

<, >, <=, >=

Fifth Order

==, !=

Sixth Order

&&

Seventh Order

||

Eighth Order

=, +=, -=, *=, /=, %=

If you want the length/size of an array

.length()

If you want to retrieve an element from an array

arr[i]

if you want the length/size of an ArrayList

.size()

if you want to retrieve an element from an ArrayList

.get(i)

if you want the length/size of a 2D Array

arr.length (for number of rows); .arr[0].length(for number of columns)

if you want to retrieve an element from a 2D Array

arr[r][c]