Complete Java Course Overview

Course Structure

• Beginner-friendly course from the basics of Java to advanced topics.
• Chapter-wise notes provided for each topic.
• Ultimate cheat sheet for quick reference in interviews and exams.

Installation of Java

1. Java Development Kit (JDK)

   • Necessary for compiling and running Java programs.
   • Go to Oracle.com to download JDK.
   • Select the Windows x64 installer and follow the installation prompts.

2. Integrated Development Environment (IDE)

   • Recommended IDE: IntelliJ IDEA
   • Download the Community version, not the Ultimate version (30-day trial).
   • Follow installation prompts and add launchers to the path for easier access.

Introduction to Java

• History of Java

  • Developed by Sun Microsystems in 1991 by James Gosling.
  • Initially called Oak; aimed to be a simple, portable, and reliable programming language based on C/C++.
  • First application language for the World Wide Web.

• Object-Oriented Programming (OOP)

  • Java is a purely OOP language; requires the use of classes and objects.
  • Unlike C++, which supports both procedural (POP) and object-oriented programming.

• Compilation vs. Interpretation

  • Java is both a compiled and interpreted language:
    • Source code is compiled into bytecode.
    • Bytecode is then interpreted into machine code.

Key Concepts

• JDK vs. JRE
  • JDK: Java Development Kit, a collection of tools for developing Java applications.
  • JRE: Java Runtime Environment, needed to run Java applications.

First Java Program

1. Open IntelliJ IDEA and create a new project.
2. Select project SDK (ensure JDK is selected).
3. Create a command line application template.
4. Write a simple program:

   public class Main {
       public static void main(String[] args) {
           System.out.println("Hello, World!");
       }
   }
   

5. Run the program to see the output "Hello, World!".

Additional Resources

• Download the course notes and cheat sheet from the provided links.
• Bookmark the Java playlist for easy access to future videos.

Conclusion

• Follow along to ensure understanding before moving to advanced concepts.
• Engage with the content by downloading resources and practicing coding.