Final em Java
if a variable declared as final then no class can change its value once
it is given a value.
Ahmad Mujtaba
if a variable declared as final then no class can change its value once
it is given a value.class FinalDemo {
// create a final method
public final void display() {
System.out.println("This is a final method.");
}
}
class Main extends FinalDemo {
// try to override final method
public final void display() {
System.out.println("The final method is overridden.");
}
public static void main(String[] args) {
Main obj = new Main();
obj.display();
}
}You cannot extend a final class. If you try it gives you a compile time error.// create a final class
final class FinalClass {
public void display() {
System.out.println("This is a final method.");
}
}
// try to extend the final class
class Main extends FinalClass {
public void display() {
System.out.println("The final method is overridden.");
}
public static void main(String[] args) {
Main obj = new Main();
obj.display();
}
}