How to use the object-oriented final keyword of Java

This article mainly introduces the Java object-oriented final keyword how to use, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

/ * * knowledge points: final keyword 1. What is final: final is the final meaning 2. The variable modified by the final keyword cannot be modified by a constant. The method modified by the final keyword cannot be overridden by a subclass. The class modified by the final keyword cannot be inherited by * / public class FinalKeyword {public static void main (String [] args) {final double PI = 3.14 System.out.println (PI); / / instantiate father Father f = new Father (); f.work (); / / instantiate son Son s = new Son (); s.study () }} / / Father class Father {public final void work () {System.out.println ("doing farm work"); / / son class Son extends Father {public void study () {System.out.println ("study hard and make progress every day") }} / daughter final class Daughter extends Father {} / grandson class GranSon extends Son {} Thank you for reading this article carefully. I hope the article "how to use the final keyword of Java object-oriented" shared by the editor will be helpful to you. At the same time, I hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!