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
Byte Streams
Last Updated : 26 May, 2026
title: Byte Streams in Java
File Handling33 words3 headingsExamples included
title: Byte Streams in Java description: FileInputStream aur FileOutputStream
Binary data (images, audio, video) ke liye. InputStream aur OutputStream base classes.
FileOutputStream — Write karna
java exampleWoHoTech
import java.io.*;
// Write bytes to file
try (FileOutputStream fos = new FileOutputStream("output.bin")) {
byte[] data = {65, 66, 67, 68, 69}; // A B C D E
fos.write(data);
fos.write(70); // Single byte: F
System.out.println("Written successfully");
} catch (IOException e) {
e.printStackTrace();
}
// Text write karna (String → bytes)
try (FileOutputStream fos = new FileOutputStream("text.txt", true)) { // append mode
String text = "Hello, File!\n";
fos.write(text.getBytes());
}FileInputStream — Read karna
// Read all bytes
try (FileInputStream fis = new FileInputStream("output.bin")) {
int byteData;
while ((byteData = fis.read()) != -1) { // -1 = end of file
System.out.print((char) byteData + " ");
}
}
// Read into byte array (efficient)
try (FileInputStream fis = new FileInputStream("output.bin")) {
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = fis.read(buffer)) != -1) {
System.out.write(buffer, 0, bytesRead);
}
}
File Copy
void copyFile(String source, String dest) throws IOException {
try (FileInputStream fis = new FileInputStream(source);
FileOutputStream fos = new FileOutputStream(dest)) {
byte[] buffer = new byte[4096];
int bytesRead;
while ((bytesRead = fis.read(buffer)) != -1)
fos.write(buffer, 0, bytesRead);
}
System.out.println("File copied!");
}
Exam Focus
Revise definitions, diagrams, examples, and short-answer points for Byte Streams.
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, file
Related Java Topics
Continue learning this concept
File HandlingCharacter Streamstitle: Character Streams in JavaFile HandlingBuffered Streamstitle: Buffered Streams in JavaFile HandlingDeserializationtitle: Deserialization in JavaFile HandlingFile Classtitle: File Class in JavaFile HandlingJava NIO New I/Otitle: NIO Package in JavaFile HandlingSerializationtitle: Serialization in Java