In this tutorial we will learn the usage of final keyword. final keyword can be used along with variables, methods and classes. We will cover following topics in detail. 1) final variable2) final method3) final class 1. Final Variables final variable…
Java 知识测试 Java final keyword Question 1 What is the use of final keyword in Java? A. When a class is made final, a sublcass of it can not be created. B. When a method is final, it can not be overridden. C. When a variable is final, it can be assigned…
你总以为你会了,事实上你仅仅是一知半解. final 关键字概览 final关键字可用于声明属性.方法.參数和类,分别表示属性不可变.方法不可覆盖.參数不可变和类不能够继承. 我们来分别看看它的使用方法. final关键字是一个比較简单的知识点,所以这篇文章我写的比較舒服,你看着也比較舒服.由于,非常easy呀~ final 属性 被final修饰的属性不可变.这样的不可变的属性.我们能够称之为"常量". 这样的常量大体上有两种表现形式. 先来看以下的代码: public class…
1. Final keyword Once a variable X is defined final, you can't change the reference of X to another object, after the initialization. But you can change the content of X if it's mutable. 2. Immutable object Once an immutable object has been created,…