Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Instance variable as final in Java
final is a non-access modifier for Java elements. The final modifier is used for finalizing the implementations of classes, methods, and variables. A final instance variable can be explicitly initialized only once.
A final instance variable should be initialized at one of the following occasions −
At time of declaration.
In constructor.
In instance block.
Compiler will throw error, it a final variable is not initialized at all using any of the above methods. Following examples showcases example of instance variables as final.
Example
public class Tester{
final int A = 1;
final int B;{
B = 2;
}
final int C;
Tester(){
C = 3;
}
public static void main(String[] args) {
Tester t = new Tester();
System.out.println("A = " + t.A + ", B = " + t.B + ", C = " + t.C);
}
}Output
A = 1, B = 2, C = 3
Updated on: 23-Jun-2020
1K+ Views
Advertisements