Java Final Keyword
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- 2. Java Final Keyword Final keyword in java is used to limiting the user. It is used to restrict method overriding, restrict inheritance, and used to make variable as constant. Final keyword can initialize in constructor only. In java final keyword is used in the following: Final variable Final method Final class Now we can learn the basics and detailed of a final keyword. Java Final variable In the java final variable, if we make any variable as final, we cannot change the value of the final variable because it will be a constant variable.
- 3. Example of Final variable
- 4. Output Show error In this example, speed limit is final variable, and we are going to change the value of this variable, but it cannot change because once the variable is declared with a final keyword cannot be modified by the program after initialization. Java Final method In the final method, when we make any method as final, then we cannot override it, or we can say subclasses cannot override the method.
- 5. Example of Final method
- 6. Output Compile time error Java Final class In java final class, the class cannot be inheriting by other classes. If we make any class as final, then we cannot extend it.
- 7. Example of Final class Output Compile time error
- 8. Final method inherited Example Output Car is running The Final method is inherited but cannot override
- 9. Blank Final variable Example Output 100