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Using final keyword to Prevent Overriding in Java
Method overriding can be prevented by using the final keyword with a method. In other words, a final method cannot be overridden.
A program that demonstrates this is given as follows:
Example
class A {
int a = 8;
final void print() {
System.out.println("Value of a: " + a);
}
}
class B extends A {
int b = 3;
void print() {
System.out.println("Value of b: " + b);
}
}
public class Demo {
public static void main(String args[]) {
B obj = new B();
obj.print();
}
}The above program generates an error as the method print() in class A is final and so it cannot be overridden by the method print() in class B. The error message is as follows:
Demo.java:15: error: print() in B cannot override print() in A
Updated on: 30-Jul-2019
2K+ Views
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