In Java, Thread Scheduler is part of the JVM (Java Virtual Machine) responsible for determining which thread runs at any given time. The Thread Scheduler uses thread priorities and the underlying operating system’s scheduling mechanisms…
In Java, Enum (short for Enumeration) is a special data type that represents a fixed set of constants. Enums provide a way to define a collection of related constants in a more readable, structured, and…
A Singleton class in Java is a class that allows only one instance of itself to be created throughout the lifetime of the application. The Singleton design pattern is useful when you need exactly one…
Java provides built-in support for multithreading, allowing you to execute multiple threads simultaneously to achieve concurrent execution. Threads in Java are lightweight processes that allow your program to perform multiple tasks at the same time,…
In Java, the break and continue statements are used to control the flow of loops (for, while, do-while) and switch statements. They provide ways to exit from a loop or skip certain iterations based on…
In Java, variables are used to store data that can be manipulated throughout the program. Java provides several types of variables, each with its own scope, lifetime, and purpose. Understanding variable types is fundamental to…
LinkedList is part of the Java Collections Framework and implements both the List and Deque interfaces. Unlike an ArrayList, which uses a dynamic array, LinkedList is a doubly linked list structure where each element (node)…
A HashSet is a part of the Java Collections Framework and implements the Set interface. It is used to store unique elements (no duplicates) and allows null values. It does not maintain any particular order…
HashMap is a part of the Java Collections Framework and is used to store key-value pairs. It implements the Map interface and uses a technique called hashing to store the elements. HashMap provides fast access,…
Lambda expressions were introduced in Java 8 as a way to implement functional programming in Java. They allow you to write more concise, readable, and flexible code, particularly when working with functional interfaces. In this…