Java Introduction....(Java Features and Architecture – Simple Explanation)...

Java Features (Easy Points):

1. Simple
   Java is easy to learn and understand.

2. Object-Oriented
   Everything in Java is based on classes and objects.

3. Platform Independent
   Java code runs on any system (Windows, Linux, Mac) using JVM.

4. Secure
   Java has built-in security features to protect data and code.

5. Robust
   Java handles errors using exception handling and memory management.

6. Multithreaded
   Java can do many tasks at the same time (like downloading and playing music).

7. High Performance
   Java uses Just-In-Time (JIT) compiler for fast execution.

8. Portable
   Java code can run on different machines without changes.

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Java Architecture (Step by Step):

Java follows this flow:

1. Java Source Code (.java)
   You write your code in a .java file.

2. Java Compiler (javac)
   It converts .java file to bytecode (.class file).

3. Bytecode
   This is a special code that is not machine-specific.

4. Java Virtual Machine (JVM)
   JVM runs the bytecode on any system and converts it into machine code.

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Simple Diagram:

.java file → (javac) → .class file → (JVM) → Machine Code

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Example:

public class MyJava {
    public static void main(String[] args) {
        System.out.println("Java is simple!");
    }
}

• Compile: javac MyJava.java
• Run: java MyJava
• Output: Java is simple!

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