All three keywords have their own utility while programming.
Final: If any restriction is required for classes, variables, or methods, the final keyword comes in handy. Inheritance of a final class and overriding of a final method is restricted by the use of the final keyword. The variable value becomes fixed after incorporating the final keyword. Example:
final int a=100;
a = 0; // error
The second statement will throw an error.
Finally: It is the block present in a program where all the codes written inside it get executed irrespective of handling of exceptions. Example:
try {
int variable = 5;
}
catch (Exception exception) {
System.out.println("Exception occurred");
}
finally {
System.out.println("Execution of finally block");
}
Finalize: Prior to the garbage collection of an object, the finalize method is called so that the clean-up activity is implemented. Example:
public static void main(String[] args) {
String example = new String("InterviewBit");
example = null;
System.gc(); // Garbage collector called
}
public void finalize() {
// Finalize called
}
