Introduction to Programming

Final variable

If a keyword final is placed in front of a variable declaration, the value of this variable once assigned (the variable is initialized) cannot be changed. The way a variable can be initialized depends on how the variable is used. There are three kinds of variable usage, and each has different initialization rules:

• A local variable is a variable declared in the block of code; it can be initialized using an assignment in the same statement with the declaration, or sometime later, but only once; here are some examples: 

        class SomeClass{          private String someValue = "Initial value";          public void setSomeValue(String someValue) {            this.someValue = someValue;          }          public String getSomeValue() {            return someValue;          }        }        public class FinalDemo ...