Making an entire class final : Final « Class « Java

1. Java
2. Class
3. Final

Making an entire class final

 

// : c06:Jurassic.java
// Making an entire class final.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

class SmallBrain {
}

final class Dinosaur {
  int i = 7;

  int j = 1;

  SmallBrain x = new SmallBrain();

  void f() {
  }
}

//! class Further extends Dinosaur {}
// error: Cannot extend final class 'Dinosaur'

public class Jurassic {
  public static void main(String[] args) {
    Dinosaur n = new Dinosaur();
    n.f();
    n.i = 40;
    n.j++;
  }
} ///:~


           
         
  

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