Knowledge Factory

When preparing for a Java interview, understanding static and final keywords is essential, as they are frequently discussed. Below is an overview of what static and final mean in Java, along with some examples and interview-style questions to help with your preparation. Understanding static and final in Java 1. static Keyword: Definition : The static keyword is used to declare class-level members. When a method or variable is marked as static , it belongs to the class rather than an instance of the class. Usage : Static Variables : These are shared by all instances of the class. There's only one copy of the static variable for all objects. Static Methods : These belong to the class itself, so they can be called without creating an instance of the class. Static methods can only access static members of the class. Static Block : This is used for static initialization of a class. It is executed once when the class is loaded into memory. Example : class Example { static ...

Java static keyword is used to create a Class level variable in java. static variables and methods are part of the class, not the instances of the class. The static keyword in Java is used for memory management mainly. We can apply java static keyword with variables, methods, blocks, and nested classes. static is a non-access modifier in Java that is applicable for the following: blocks variables methods nested classes Interface static method(Java 8 onwards) Java static variable We can use static keyword with a class-level variable. A static variable is a class variable and doesn’t belong to the Object/instance of the class. Since static variables are shared across all the instances of Object, they do not thread-safe. Usually, static variables are used with the final keyword for common resources or constants that can be used by all the objects. public class KnowledgeFactoryStaticDemo { // static variable example private static int count; public stat...