Introduction Thread synchronization in Java is a mechanism that ensures that two or more concurrent threads do not simultaneously execute some particular program segment known as the critical section. Synchronization is essential for preventing thread interference and consistency problems when multiple threads access shared resources. Key Points: Critical Section: A segment of code that accesses …
Introduction Understanding the lifecycle of a thread is essential for effectively managing and utilizing multithreading in Java. A thread in Java goes through various states from its creation to termination. The Thread class provides methods to manage the lifecycle of a thread, allowing you to control its execution and ensure proper synchronization and communication between …
Introduction The Runnable interface in Java is a functional interface that represents a task that can be executed by a thread. It contains a single abstract method, run(), which encapsulates the code to be executed by the thread. The Runnable interface is often used to define the work a thread will perform, and it can …
Introduction The Thread class in Java is a part of the java.lang package and provides the facility to create and manage threads. A thread is a lightweight subprocess, the smallest unit of processing. Multithreading in Java is a process of executing multiple threads simultaneously to maximize CPU utilization and improve the performance of applications. Key …
Introduction Multithreading in Java is a feature that allows concurrent execution of two or more threads, enabling efficient utilization of the CPU. Each thread runs in parallel and can perform tasks simultaneously, improving the performance and responsiveness of applications. Java provides built-in support for multithreading through the java.lang.Thread class and the java.util.concurrent package. Key Points: …
The ArrayList class in Java is a part of the Java Collections Framework. It provides resizable-array implementation of the List interface. Java ArrayList allows us to randomly access the list, as it implements the RandomAccess interface. Below is a table that lists the methods available in the Java ArrayList class. Each method link provides detailed …
Introduction The Map interface is a part of the Java Collections Framework and represents a collection of key-value pairs. It models the mathematical map abstraction, allowing you to associate a specific key with a value. The Map interface provides methods to perform standard map operations such as insertion, deletion, and retrieval of key-value pairs. It …
Introduction The Set interface is part of the Java Collections Framework and represents a collection that does not allow duplicate elements. It models the mathematical set abstraction and provides methods to perform standard set operations like union, intersection, and difference. The Set interface extends the Collection interface and is found in the java.util package. Table …
Introduction The List interface is a part of the Java Collections Framework and represents an ordered collection (also known as a sequence). Lists can contain duplicate elements, and the elements can be accessed by their integer index (position in the list). The List interface extends the Collection interface and is found in the java.util package. …
Introduction The Collection interface is the root interface in the Java Collections Framework. It provides the basic methods that are available for all collection interfaces such as List, Set, and Queue. The Collection interface is a part of the java.util package and represents a group of objects, known as its elements. Table of Contents What …
Introduction PriorityQueue in Java is a part of the Java Collections Framework and implements the Queue interface. It is a priority-based queue that orders its elements according to their natural ordering or by a Comparator provided at queue construction time. The elements of the PriorityQueue are ordered in a way that allows the element with …
Introduction The Java Collections Framework (JCF) is a unified architecture for representing and manipulating collections of objects. Collections are used to store, retrieve, manipulate, and communicate aggregate data. The JCF provides a set of interfaces and classes to support operations on collections of objects. Table of Contents What is the Java Collections Framework? Key Points …
Introduction Hashtable in Java is part of the Java Collections Framework and implements the Map interface. It is a data structure that uses a hash table for storage, allowing for the mapping of keys to values. Hashtable is synchronized, making it thread-safe for use in concurrent applications, but it does not allow null keys or …
Introduction TreeMap in Java is part of the Java Collections Framework and implements the NavigableMap interface, which is a subtype of the SortedMap interface. It is a collection that uses a Red-Black tree structure to store key-value pairs. TreeMap ensures that the keys are stored in a sorted order, and it provides guaranteed log(n) time …
1. Introduction In this tutorial, you will learn: What is LinkedHashMap? Key Points About LinkedHashMap Creating a LinkedHashMap and Adding Elements Accessing Elements in a LinkedHashMap Modifying Elements in a LinkedHashMap Removing Elements from a LinkedHashMap Iterating Over a LinkedHashMap Searching for Elements in a LinkedHashMap LinkedHashMap of User-Defined Objects Common LinkedHashMap Methods Conclusion 1. …
Introduction HashMap in Java is part of the Java Collections Framework and implements the Map interface. It is a hash table-based implementation that provides the ability to store and retrieve key-value pairs. HashMap allows one null key and multiple null values and offers constant-time performance for basic operations like get and put, assuming the hash …
Introduction TreeSet in Java is a part of the Java Collections Framework and implements the NavigableSet interface, which is a subtype of the SortedSet interface. It is a collection that uses a Red-Black tree structure to store elements. TreeSet ensures that the elements are stored in a sorted order, and it provides guaranteed log(n) time …
Introduction LinkedHashSet in Java is a part of the Java Collections Framework and implements the Set interface. It is a hash table and linked list implementation of the Set interface, with predictable iteration order. It maintains a doubly-linked list running through all of its entries, which defines the iteration order as the order in which …
Introduction HashSet in Java is a part of the Java Collections Framework and implements the Set interface. It is a collection that uses a hash table for storage. Unlike List, a Set does not allow duplicate elements. HashSet provides a way to store unique elements and allows for fast access and retrieval of data. Table …
Introduction Vector in Java is a dynamic array that implements the List interface. It is part of the Java Collections Framework and is found in the java.util package. Vector is similar to ArrayList, but it is synchronized, making it thread-safe. This synchronization ensures that Vector can be used in a multi-threaded environment without additional synchronization. …
Introduction A Stack is a collection class that represents a last-in, first-out (LIFO) stack of objects. It extends the Vector class with five operations that allow a vector to be treated as a stack. The usual push and pop operations are provided, as well as a method to peek at the top item on the …
Introduction LinkedList in Java is a part of the Java Collections Framework and implements the List and Deque interfaces. Unlike ArrayList, which uses a dynamic array, LinkedList uses a doubly linked list to store its elements. This structure allows for efficient insertions and deletions, but accessing elements by index is slower compared to ArrayList. Table …
Introduction ArrayList in Java is a resizable array implementation of the List interface. Unlike arrays, ArrayList can grow and shrink dynamically, which makes it a flexible and convenient data structure for managing collections of objects. It is part of the java.util package and provides various methods to manipulate the elements in the list. Table of …
Introduction The try-with-resources statement in Java is a powerful feature that allows you to manage resources automatically. It ensures that each resource is closed at the end of the statement, helping to prevent resource leaks and simplifying the code. This feature was introduced in Java 7 and is primarily used for managing resources like file …
Introduction Unchecked exceptions in Java are exceptions that are not checked at compile-time. These exceptions occur during the execution of the program and are typically caused by programming errors, such as logic errors or improper use of an API. Unchecked exceptions are subclasses of RuntimeException and do not need to be declared in a method’s …