October 2021
Intermediate to advanced
131 pages
1h 34m
English
A variable in Java can be made into a constant by adding the final keyword before the data type. This modifier means that the variable can’t be reassigned once it’s been set, and any attempts to do so will result in a compile-time error.
Local Constants
A local variable can instead be declared as a constant by applying the final keyword. Such a constant must always be initialized at the same time as it’s declared. The Java naming convention for constants is to use all uppercase letters and to separate words with underscores.
final double PI = 3.14;
Constant Fields
Class and instance ...
