Found 9326 Articles for Object Oriented Programming

Introduction Message passing, a method of transferring communications among items or threads, is an essential idea in distributed systems and parallel programming. The transmission of messages in Java may be accomplished with an assortment of methods and structures, based on the implementation's particular needs Using the power source java.util.concurrent the container, which offers an array of interfaces and class libraries for establishing and handling threads that are active locks, and synchronization mechanisms, is a single method for implementing passing messages in Java, for instance. An Executor interface, for instance, is able to be utilized without delay to carry out duties, ... Read More

Threads are an important aspect of Java programs. They are also known as lightweight processes. Every program in Java has at least a main thread. They play a very important role to run multiple tasks at the same time. They run in the background and do not affect the execution of the main program. The use of multiple threads simultaneously is called multithreading. States of a Thread A thread can exist in either of the following states. It has a complete lifecycle from its creation to destruction. The thread lifecycle states are- ... Read More

Input and output are the vital components of all the programming languages. Same is the case with Java. User input is very crucial for creating dynamic and interactive applications. Usually the input is a single value but we can also take input from the user separated by space. This article deals with how to take input from the user separated by spaces in Java. Ways to Take Input From User Separated By Space in Java There are 2 ways by which we can take the input from the user separated by space. They are as follows- ... Read More

At times, we need information related to a class file. In such a case, we can use the javap tool provided by the Java Development Kit (JDK). We can get more information related to the methods, constructors, and fields present in the class. The purpose of the javap tool is to disassemble one or more class files. It is also known as Java Class File Disassembler. Using the javap tool, we can get more information about the bytecode information about that particular class. The output may vary depending on the options used. Syntax The syntax of javap is ... Read More

A TreeSet in Java stores unique elements in sorted order. It implements the SortedSet interface. The TreeSet interface internally uses a balanced tree called the Red-Black tree. A List in Java is a data structure that is used to store elements in the order in which they were added. We can create a TreeSet with a List in Java in many ways. This article deals with the ways in which a TreeSet can be created using a List in Java. Ways to Create a TreeSet with a List in Java There are 3 ways by which a TreeSet ... Read More

You are given a directed and unweighted graph G and an integer K. You have to find the number of paths in the graph of length K. Here the graph is in the form of an adjacency matrix. From vertex i to j, if there exists an edge, it is denoted by G[i][j]=1 else denoted by G[i][j]=0. Input A directed and unweighted graph represented by an adjacency matrix Integer K that denotes the length of path to be found Output Total number ... Read More

Introduction In this tutorial, we will walk you through the process of setting up a Java development environment in Visual Studio Code (VS Code) and introduce you to some useful tools and techniques for competitive programming, including fast input/output (I/O) techniques and useful code snippets. Setting up Java Development Environment in VS Code To start coding in Java within VS Code, follow these steps − Install Java Extension Pack− Open VS Code and navigate to the Extensions view by clicking on the square icon on the left sidebar or by using the shortcut Ctrl+Shift+X (Windows/Linux) or Cmd+Shift+X (Mac). Search ... Read More

Java Input/Output (I/O) operations play a crucial role in handling various types of data, allowing us to read from and write to different sources such as files, network connections, and standard input/output streams. When dealing with input and output in Java, we encounter situations where we need to handle both primitive and object types of data. Java provides two options to facilitate this: wrapper classes or working directly with primitive class variables. This tutorial will teach us about Wrapper Classes and Primitive Data Types. For using these, each approach has its advantages and considerations, which we will delve into to ... Read More

Java generics provide a mechanism for writing reusable and type-safe code. They allow classes, methods, and interfaces to operate on different data types while providing compile-time type checking. One of the primary advantages of using generics in competitive programming is the ability to create generic data structures. These data structures, such as stacks, queues, linked lists, and trees, can be implemented once and reused across multiple problem-solving scenarios. This tutorial will give examples of Java generics and some methods used in competitive programming. Java Generics By utilizing Java generics, you can create versatile and efficient code that can handle a ... Read More

In this tutorial, we will explore Java Extension Methods, a powerful feature introduced in Java 8. Extension methods allow developers to add new functionality to existing classes without modifying their source code. This feature is especially useful when working with library classes or third-party APIs, as it enables us to extend their capabilities without having to subclass or create wrapper classes. Syntax Users can follow the syntax below to create extension methods in Java− public interface SomeInterface { static returnType methodName(arguments) { // Method implementation } } ... Read More