Java Topics
HubJava Collections FrameworkCollections Practice ProgramsComparable vs ComparatorGenericsIteratorArrayListLinkedListStackVectorHashMapHashtableLinkedHashMapTreeMapArrayDequeDeque Double-Ended QueuePriorityQueueHashSetLinkedHashSetTreeSetAdapter PatternBuilder PatternFactory PatternMVC PatternObserver PatternSingleton PatternDynamic ProgrammingGraphHashingHeapLinked List DSAQueue DSARecursionSearching AlgorithmsSorting AlgorithmsStack DSATime ComplexityTreesException Handling Best PracticesCustom ExceptionException Hierarchyfinally BlockException Handlingthrow aur throwstry-catchBuffered StreamsByte StreamsCharacter StreamsDeserializationFile ClassJava NIO New I/OSerializationArrays in JavaArray OperationsArray Practice ProgramsArray Interview QuestionsJagged ArrayMulti-Dimensional ArraysOne Dimensional Arraybreak aur continuedo-while Loopfor Loopif-else StatementsNested Loopsswitch-case Statementwhile LoopJava Compilation ProcessJava ki FeaturesPehla Java ProgramHistory of JavaJava EditionsJava Program StructureJDK, JRE aur JVMJava Kya Hai?Immutable StringsString Class in JavaString Interview QuestionsString MethodsString Practice ProgramsStringBufferStringBuilderComments in JavaData Types in JavaIdentifiers in JavaInput & Output in JavaJava KeywordsOperators in JavaType Casting in JavaVariables in JavaJava Coding Interview QuestionsCollections Interview QuestionsCore Java Interview QuestionsJDBC Interview QuestionsMultithreading Interview QuestionsOOPs Interview QuestionsSpring Framework Interview QuestionsJava 8 Date/Time APIDefault aur Static Methods in InterfaceFunctional InterfaceLambda ExpressionMethod ReferenceOptional ClassStream APIBatch ProcessingCallableStatementJDBC ArchitectureJDBC — Java Database ConnectivityJDBC Practice ProjectsMySQL ConnectionPreparedStatementResultSetStatement InterfaceTransaction ManagementCreating ThreadsDaemon ThreadExecutor FrameworkInter-Thread CommunicationMultithreading Practice ProgramsRunnable InterfaceSynchronizationThread ClassMultithreading IntroductionThread Life CycleThread PriorityJava Cheat SheetImportant Formulas & Key ConceptsImportant Java ProgramsJava Quick RevisionAbstract ClassAbstractionAnonymous ClassClass and ObjectConstructorEncapsulationInheritanceInner ClassInterfaceMethod OverloadingMethod OverridingObject ClassObject CloningObject-Oriented Programming OOPPolymorphismstatic Keywordsuper Keywordthis KeywordWrapper ClassesArray Practice ProgramsBasic Java Practice ProgramsCollection Practice ProgramsJDBC Practice ProgramsMultithreading Practice ProgramsOOPs Practice ProgramsPlacement Coding QuestionsString Practice ProgramsBanking SystemChat ApplicationE-Commerce Backend — Spring Boot REST APIEmployee Management SystemLibrary Management SystemSpring Boot Fullstack ProjectStudent Management SystemCookies in ServletExpression Language ELGenericServletHttpServletJavaServer Pages JSPJSP TagsMVC ArchitectureHttpServletRequest & HttpServletResponseServlet IntroductionServlet Life CycleSession TrackingDependency InjectionSpring BeansSpring CoreSpring FrameworkAPI GatewaySpring Cloud Config ServerDocker DeploymentEureka Server — Service DiscoverySpring Boot CRUD ApplicationException Handling in Spring BootJWT AuthenticationREST API in Spring BootSpring SecuritySpring BootSpring Data JPAValidation in Spring Boot
String Class in Java
Last Updated : 26 May, 2026
title: String Class in Java
Fundamentals89 words7 headingsExamples included
title: String Class in Java description: Java mein String class ka introduction
String kya hai?
String ek sequence of characters hai. Java mein String ek class hai, primitive type nahi.
String Create karna
String Literal (Preferred)
java exampleWoHoTech
String s = "Hello";
// String Pool mein store hota hainew keyword se
java exampleWoHoTech
String s = new String("Hello");
// Heap mein naya object banta haiString Pool
Java mein String Pool (intern pool) ek special memory area hai jahan String literals store hote hain. Same literal dobara create karte hain to naya object nahi banta.
java exampleWoHoTech
String s1 = "Java";
String s2 = "Java";
System.out.println(s1 == s2); // true (same pool object)
String s3 = new String("Java");
System.out.println(s1 == s3); // false (different heap object)
System.out.println(s1.equals(s3)); // true (same content)String Immutability
String objects change nahi ho sakte. Modification pe naya object banta hai.
java exampleWoHoTech
String s = "Hello";
s = s + " World"; // Naya object bana, "Hello World"
// Original "Hello" ab bhi pool mein haiString Length
java exampleWoHoTech
String s = "Hello";
System.out.println(s.length()); // 5Exam Focus
Revise definitions, diagrams, examples, and short-answer points for String Class in Java.
Interview Use
Prepare one clear explanation, one practical example, and one common mistake for this Java topic.
Search Terms
java, java programming, core java, java master course, java notes, master, course, fundamentals
Related Java Topics
Continue learning this concept
FundamentalsString Interview Questionstitle: String Interview QuestionsFundamentalsString Methodstitle: String MethodsFundamentalsString Practice Programstitle: String ProgramsFundamentalsImmutable Stringstitle: Immutable Strings in JavaFundamentalsStringBuffertitle: StringBuffer in JavaFundamentalsStringBuildertitle: StringBuilder in Java