final Variables

A final variable, also called a “constant,” is a variable whose value you can’t change after it’s been initialized. For example, you might use a final variable to define a constant value, such as pi. To declare a final variable, you add the final keyword to the variable declaration, like this:

static final int WEEKDAYS = 5;

Although it isn’t required, adding the static keyword is common for final variables.

Using all capital letters for final variable names is a common convention. That way, you can easily spot the use of final variables in your programs.