Java Tutorials
  • Introduction to Java
    • What is Java?
    • History and Features of Java
    • Java Virtual Machine (JVM) and Bytecode
    • Why Java?
  • Setting up Java Development Environment
    • Installing Java Development Kit (JDK)
    • JDK vs JRE
    • Setting up IDE (Eclipse, IntelliJ, NetBeans) or Text Editor (VS Code, Sublime Text)
  • Basic Java
    • First Java Program : Hello World
    • Variable
    • Data Type
    • Constant
    • Date and Format
    • Operator
    • Condition
    • Looping
    • Function
    • Variadic Function
    • Enums
    • Array
    • Collection
    • Exception and Exception Handling
    • Naming Convention
  • Object Oriented Programming (OOP)
    • Classes and Objects
    • Inheritance and Polymorphism
    • Encapsulation and Abstraction
  • File Handling
    • Reading and Writing Binary File
    • Reading and Writing Text File
    • Serialization and Deserialization
  • Multithreading
    • Creating and Running Threads
    • Synchronization
    • Thread Pools and Executors
  • Collections API
    • Sorting and Comparable
    • Searching and Comparator
  • Java Database Connectivity (JDBC)
    • Introduction and Life Cycle
    • Connection to Database (MySQL)
    • Downloading JDBC Drivers for Various Databases
    • Maven and Gradle JDBC Drivers for Various Databases
    • JDBC URL Formats
    • Statement and PreparedStatement
    • CallableStatement
    • Selecting Data using JDBC
    • Inserting Data using JDBC
    • Updating Data using JDBC
    • Deleting Data using JDBC
    • Invoking Function and Stored Procedure using JDBC
  • Lambda
    • Introduction to Lambda Expressions
    • Functional Interface
    • Filtering, Mapping, Reducing
    • Lambda Expressions in Collections
    • Method References
    • Functional Programming Concepts
    • Stream API
    • Error Handling in Lambda Expressions
    • Optional in Functional Programming
    • Parallel Processing with Lambda
    • Functional Programming Patterns
    • Advanced Topics in Lambda Expressions
    • Best Practices and Design Patterns
    • Real-World Use Cases and Examples
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  1. Introduction to Java

Java Virtual Machine (JVM) and Bytecode

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Last updated 1 year ago

Java Virtual Machine (JVM):

The JVM is a crucial component of the Java Runtime Environment (JRE) and Java Development Kit (JDK). It acts as an interpreter, executing Java bytecode and translating it into machine-specific code, allowing Java applications to run on any platform with a compatible JVM. JVM provides several services, including memory management, garbage collection, and security checks, ensuring the smooth execution of Java programs.

Bytecode:

Java source code is compiled into an intermediate form called bytecode. Bytecode is a platform-independent, low-level representation of the source code. Instead of compiling Java code directly into machine code, the Java compiler converts it into bytecode, which can be executed by any JVM. This bytecode is stored in files with a .class extension and is the same for all platforms, enabling Java's cross-platform compatibility.

In summary, Java's versatility, simplicity, and platform independence, coupled with the Java Virtual Machine's ability to execute bytecode, have made Java one of the most widely used and enduring programming languages in the world of software development.