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What is Java?

Developed by Sun Microsystems in 1995, Java is a highly popular, object-oriented programming language. This platform independent programming language is utilized for Android development, web development, artificial intelligence, cloud applications, and much more....

First Java Program

Java // A Java program to print "Hello World" public class GFG { public static void main(String args[]) { System.out.println("Hello World"); } }...

Get Started with Free Java Tutorial

Here in this section, you will find all the free resources that you need to become zero to mastery in Java programming language....

Overview of Java

Introduction to JavaHistory of JavaJava vs C++ vs PythonHow to Download and Install Java?Setting Up the Environment in JavaHow to Download and Install Eclipse on Windows?Java Development Kit (JDK) in JavaJVM and its architectureJDK Vs JRE Vs JVMJust In Time CompilerJIT Vs JVMByte Code Vs Machine Code...

Basics of Java

Java Basic SyntaxFirst Java Program (Hello World)Datatypes in JavaPrimitive Vs Non-Primitive DatatypesJava IdentifiersOperators in JavaJava VariablesJava KeywordsScope of VariablesWrapper Classes in Java...

Input/Output in Java

How to take Input from users in JavaScanner class in JavaBufferedReader class in JavaScanner vs BufferedReader in JavaWays to Read Input from Console in JavaPrint Output in Javaprint() Vs println() in JavaFormatted Outputs in Java...

Flow Control in Java

Decision making in JavaIf Statement in JavaIf-Else Statement in javaIf-Else-If ladder in JavaLoops in JavaFor loopWhile LoopDo while loopFor each loopContinue Statement in javaBreak Statement In JavaUsage of Break in JavaReturn Statement in Java...

Operators in Java

Arithmetic OperatorUnary OperatorAssignment OperatorRelational OperatorLogical OperatorTernary OperatorBitwise Operator...

Arrays in Java

Introduction to Arrays in JavaArrays class in JavaMulti-Dimensional Array in JavaHow to declare and initialize 2D arrays in JavaJagged array in JavaFinal Arrays in JavaReflect Arrays in JavaJava util.Arrays Vs reflect.ArraysJava Array Programs...

Strings in Java

Introduction of Strings in JavaString class in Java Set-1 | Set-2Why strings are immutable in Java?StringBuffer class in JavaStringBuilder class in JavaStrings vs StringBuffer vs StringBuilder in JavaStringTokenizer class in Java Set-1 | Set-2StringJoiner in JavaJava String Programs...

OOPS in Java

OOPS in Java refers to Object-Oriented Programming concepts implemented in the Java programming language. Java’s OOP features include classes, objects, inheritance, polymorphism, and encapsulation, enabling modular and efficient code development. Understanding OOPS in Java is essential for building robust, scalable, and maintainable software applications....

Classes of Java

Classes in Java are the blueprint for creating objects and defining their properties and behaviors. They are the fundamental building blocks of Java programs, enabling the creation of reusable and modular code. Classes can contain fields, methods, constructors, and nested classes, providing a wide range of functionality and flexibility....

Interfaces in Java

Interfaces in Java are abstract types that define a set of methods that a class must implement. They provide a way to achieve abstraction, multiple inheritance, and loose coupling in Java programs. Interfaces are useful for defining common behaviors and functionalities that can be shared across different classes, leading to more modular and reusable code. Mastering interfaces in Java is crucial for building flexible and extensible software applications....

Methods in Java

Introduction to methods in JavaDifferent method calls in JavaStatic methods Vs Instance methods in JavaAbstract methods in JavaMethod Overriding in JavaMethod Overloading in JavaMethod Overloading Vs Method Overriding...

Packages in Java

Java PackagesHow to create a package in Javajava.util packagejava.lang packagejava.io package...

Collection Framework in Java

Java Collection FrameworkCollections class in JavaCollection Interface in JavaList Interface in JavaQueue Interface in JavaMap Interface in JavaSet Interface in JavaSortedSet Interface in JavaDeque Interface in JavaComparator in JavaComparator Vs Comparable in JavaIterator in Java...

Collection Classes in Java

ArrayList in JavaVector class in JavaStack class in JavaLinkedList in JavaPriority Queue in JavaHashMap in JavaLinkedHashMap in JavaDictionary in JavaHashTable in JavaHashSet in JavaTreeSet in JavaLinkedHashSet in Java...

Memory Allocation in Java

Java Memory ManagementHow are Java objects stored in memoryStack vs Heap memory allocationTypes of memory areas allocated by JVMGarbage Collection in JavaHeap and Stack memory allocationTypes of JVM Garbage Collectors in JavaMemory leaks in JavaJava Virtual Machine(JVM) Stack Area...

Exception Handling in Java

Exceptions in javaTypes of ExceptionsChecked Vs Unchecked ExceptionsTry, Catch, Finally, throw, and throwsFlow control in Try catch blockThrow vs ThrowsFinal vs Finally vs FinalizeUser-defined custom exceptionChained ExceptionsNull pointer ExceptionsException handling with method Overriding...

Multithreading in Java

Introduction to Multithreading in JavaLifecycle and Stages of a ThreadThread Priority in JavaMain Thread in JavaThread classRunnable interfaceHow to name a threadstart() method in threadrun() vs start() Method in Javasleep() methodDaemon threadThread Pool in JavaThread Group in JavaThread Safety in JavaShutdownHookMultithreading Tutorial...

Synchronization in Java

Java SynchronizationImportance of Thread synchronization in JavaMethod and Block Synchronization in JavaLocal frameworks vs thread synchronizationAtomic Vs Volatile in JavaAtomic Vs Synchronized in JavaDeadlock in MultithreadingDeadlock Prevention and AvoidanceLock Vs Monitor in ConcurrencyReentrant Lock...

File Handling in Java

File Class in javaHow to create files in javaHow to read files in javaHow to write on files in javaHow to delete a file in javaFile PermissionsFileReaderFile WriterFileDescriptor classRandomAccessFile class...

Java Regex

Introduction to Java RegexHow to write Regex expressionsMatcher classPattern classQuantifiersCharacter class...

Java IO

Introduction to Java IOReader ClassWriter ClassFileInput streamFile Output streamBufferedReader Input StreamBufferedReader Output streamBufferedReader vs ScannerFast I/O in Java...

Java Networking

Introduction to Java NetworkingTCP architectureUDP architectureIPV4 Vs IPV6Connection-oriented Vs connectionless protocolsSocket programming in JavaServer Socket classURL class and methods...

Java SE 8 Features

Lambda ExpressionsStreams APINew Date/Time APIDefault MethodsFunctional InterfacesMethod referencesOptional classStream FilterType AnnotationsString Joiner...

Java Date & Time

Date Class in JavaMethods of the Date classJava Current Date and timeCompare dates in Java...

Java JDBC

Introduction to Java JDBCJDBC DriverJDBC ConnectionTypes of Statements in JDBCJDBC Tutorial...

Java Miscellaneous

Introduction to Reflection APIJava IO TutorialJavaFX TutorialJava RMIHow to Run Java RMI application?Java 17 New Features...

Interview Questions on Java

Core Java Interview QuestionsJava Multiple Choice Questions...

Java Practice Problems

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Java Jobs & Opportunity

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