How to determine the time costs when adding an element to an ArrayList?

The increment operation on a variable in Java is called increment. It is performed using the ++ operator.

There are two usage options:

• Prefix increment (++var) — increases the value of the variable first, then returns the new value.
• Postfix increment (var++) — returns the current value of the variable, then increases it.

Example:

int a = 5;
int b = ++a; // a becomes 6, b is also 6

int c = 5;
int d = c++; // d will be 5, c becomes 6 after the operation

Increment is often used in loops and counters for convenient increase of value by 1.