Java Main Method

    Master the entry point of every Java program

    Lab Session 1Core ConceptInteractive
    Practice Progress0/3 exercises completed

    Learning Objectives

    Understand the structure and syntax of the main method
    Explain each component of the main method signature
    Write and execute basic Java programs using the main method
    Handle command-line arguments effectively

    What is the Main Method?

    The main method is the entry point of any Java application. When you run a Java program, the JVM (Java Virtual Machine) looks for the main method to start program execution.

    🔍 Key Points:

    • • Starting Point: Where your program begins execution
    • • JVM Requirement: JVM specifically looks for this method signature
    • • One Per Class: Each executable class needs exactly one main method
    • • Fixed Signature: Must follow exact syntax rules

    Main Method Signature

    The Complete Main Method Signature
    java
    public static void main(String[] args)

    Remember: This signature must be exactly as shown. Any deviation will prevent the JVM from recognizing it as the entry point!

    Program Execution Flow

    java ClassName
    JVM Starts
    Finds main()
    Executes Code