Corporate Training Study Material
Java Installation & Environment Setup
📌 Objectives:
By the end of this
session, trainees will:
✅ Understand how to
install Java Development Kit (JDK).
✅ Learn how to configure PATH
and CLASSPATH.
✅ Set up and explore
Integrated Development Environments (Eclipse, IntelliJ IDEA, NetBeans).
1️⃣ Introduction to
Java Installation
Before writing and
executing Java programs, we need to install Java Development Kit (JDK)
and configure the environment.
1.1 What is JDK, JRE, and
JVM?
|
Component |
Description |
|
JVM (Java Virtual
Machine) |
Runs Java bytecode
(.class files) and provides platform independence. |
|
JRE (Java Runtime
Environment) |
Includes JVM and
libraries required to run Java applications. |
|
JDK (Java Development
Kit) |
Includes JRE,
compilers, and tools needed to develop Java programs. |
📌 JDK is required for writing and
compiling Java programs.
2️⃣ Installing Java
Development Kit (JDK)
2.1 Downloading and
Installing JDK
1.
Visit Oracle JDK Download Page:
🔗 https://www.oracle.com/java/technologies/javase-downloads.html
2.
Download the latest JDK for your operating
system (Windows, macOS, Linux).
3.
Run the installer and follow on-screen
instructions.
4.
Verify installation:
o Open
Command Prompt (Windows) / Terminal (Mac/Linux) and type:
java -version
o If
installed correctly, it will display:
java version "17.0.2" (or latest version)
📌 Tip: You can also install
OpenJDK from Adoptium
or Amazon Corretto
(free alternatives).
3️⃣ Setting Up
Environment Variables (PATH & CLASSPATH)
3.1 Why Set PATH and
CLASSPATH?
- PATH:
Helps the system locate Java commands (javac, java) from any directory.
- CLASSPATH:
Tells Java where to find class files and libraries.
3.2 Configuring PATH on
Windows
1.
Find JDK Installation Directory
(e.g., C:\Program Files\Java\jdk-17\bin).
2.
Add it to PATH:
o Windows
10/11:
§ Search
"Environment Variables" → Click Edit System Variables.
§ Under
System Variables, find PATH → Click Edit.
§ Click
New, add:
C:\Program Files\Java\jdk-17\bin
§ Click
OK → Restart Command Prompt.
3.
Verify:
o Open
CMD and type:
javac -version
o Expected
output:
javac 17.0.2
3.3 Configuring PATH on
macOS & Linux
1.
Open Terminal and edit .bashrc or .zshrc:
nano ~/.bashrc (or ~/.zshrc for macOS)
2.
Add:
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-17.jdk/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH
3.
Save and apply:
source ~/.bashrc (or source ~/.zshrc)
4.
Verify:
java -version
📌 Tip: You can use echo %PATH%
(Windows) or echo $PATH (Linux/macOS) to check if the PATH is set correctly.
4️⃣ Installing and
Using Java IDEs
To write and run Java
programs efficiently, we use Integrated Development Environments (IDEs).
4.1 Popular Java IDEs
|
IDE |
Description |
|
Eclipse |
Free, widely used,
supports plugins for Java EE, Spring, etc. |
|
IntelliJ IDEA |
Feature-rich, good for
professional developers. |
|
NetBeans |
Good for Java SE &
EE development, open-source. |
4.2 Installing Eclipse
1.
Download Eclipse
from https://www.eclipse.org/downloads/
2.
Install Eclipse IDE for Java Developers.
3.
Launch Eclipse → Create a New Java
Project.
4.
Write a simple Java program:
public class Hello {
public static void main(String[] args) {
System.out.println("Hello, Java
Corporate Training!");
}
}
5.
Click Run ▶ to execute the program.
4.3 Installing IntelliJ
IDEA
1.
Download IntelliJ IDEA
from https://www.jetbrains.com/idea/
2.
Install and launch the IDE.
3.
Create a New Java Project → Write a
Java program.
4.
Click Run ▶.
4.4 Installing NetBeans
1.
Download NetBeans
from https://netbeans.apache.org/download/
2.
Install NetBeans and create a New Java
Project.
3.
Write and execute Java programs.
📌 Tip: IntelliJ IDEA (Community
Edition) is best for beginners, while Eclipse is ideal for enterprise projects.
5️⃣ Summary
✅ JDK is essential for Java
development.
✅ Always set PATH and
CLASSPATH properly.
✅ Use an IDE
(Eclipse, IntelliJ, NetBeans) for efficiency.
✅ Regularly update Java to
stay secure.
💡 Practical Hands-on
Exercise
🎯 Task 1: Install Java and Verify
Installation
1.
Install JDK (Oracle/OpenJDK).
2.
Set up PATH and CLASSPATH.
3.
Run java -version and javac -version.
🎯 Task 2: Write and Run a Java
Program
1.
Open an IDE (Eclipse, IntelliJ).
2.
Create a New Java Project.
3. Write this program:
public class Test {
public static void main(String[] args) {
System.out.println("Java Training
is Live!");
}
}
4.
Run the program.
📝 Frequently Asked
Questions (FAQs)
Q1: Do I need JDK if I
only want to run Java applications?
A:
No, you only need JRE to run Java applications. But for development, JDK
is required.
Q2: What is the
difference between OpenJDK and Oracle JDK?
A:
OpenJDK is open-source, while Oracle JDK includes commercial support. Both are
functionally similar.
Q3: How do I check if
Java is installed?
A:
Run java -version in Command Prompt or Terminal.
Q4: Why do we set PATH in
Java?
A:
So that javac and java commands work from any location in the system.
📌 Additional Resources
- Java
SE Documentation: https://docs.oracle.com/en/java/
- Online
Java Compiler: https://www.jdoodle.com/
- Java
Community Support: https://stackoverflow.com/
📌 PowerPoint Presentation (PPT) Outline
Slide 1: Title Slide
- Title:
Java Installation & Environment Setup
- Subtitle:
Corporate Training Session
- Trainer
Name & Date
Slide 2: Agenda
🔹 Introduction to JDK, JRE, and JVM
🔹 Installing Java
Development Kit (JDK)
🔹 Configuring PATH
and CLASSPATH
🔹 Setting up Java
IDEs (Eclipse, IntelliJ, NetBeans)
🔹 Running a Sample
Java Program
Slide 3: Java Development
Kit (JDK) Overview
🟢 JDK: Contains JRE +
Development Tools
🟢 JRE: Runs
Java applications
🟢 JVM:
Converts Java bytecode into machine code
📌 Diagram: JVM → JRE → JDK
Slide 4: Downloading
& Installing JDK
- Step
1: Visit Oracle JDK
- Step
2: Select OS (Windows, macOS, Linux)
- Step
3: Install and follow instructions
📌 Screenshot of JDK Download Page
Slide 5: Setting Up
Environment Variables (PATH & CLASSPATH)
- Why?
To access Java commands (javac, java) from any directory
- How?
- Windows:
Add C:\Program Files\Java\jdk-XX\bin to PATH
- Mac/Linux:
Update ~/.bashrc or ~/.zshrc
📌 Command Examples: java
-version, javac -version
Slide 6: Java IDEs -
Choosing the Right One
🔹 Eclipse - Best for large
enterprise projects
🔹 IntelliJ IDEA
- Best for modern Java development
🔹 NetBeans -
Lightweight & simple
📌 Comparison Table
Slide 7: Installing and
Using Eclipse
- Step
1: Download from eclipse.org
- Step
2: Install Eclipse IDE for Java Developers
- Step
3: Open Eclipse → Create a Java Project
- Step
4: Write & Run Java Program
📌 Screenshot of Eclipse Interface
Slide 8: Running Your First Java Program
public class Hello {
public static void main(String[] args) {
System.out.println("Welcome to
Java Corporate Training!");
}
}
✅ Click "Run" in IDE or use
terminal java Hello
Slide 9: Summary &
Best Practices
✔ Install the latest JDK
✔ Properly configure PATH
& CLASSPATH
✔ Use an IDE for faster
development
✔ Always test installation
with java -version
📌 Q&A Session
Slide 10: Thank You!
- Feedback
& Queries
- Trainer
Contact Info
🎥 Live Demo Ideas for
Corporate Training
✅ Demo 1: JDK Installation & Version
Check
- Step
1: Install JDK (Live demonstration)
- Step
2: Run java -version and javac -version
✅ Demo 2: Configuring PATH &
CLASSPATH
- Step
1: Show how to set PATH
- Step
2: Demonstrate Java command execution from any
folder
✅ Demo 3: Writing & Running a Java
Program
- Step
1: Open Eclipse or IntelliJ IDEA
- Step
2: Write a basic Java program
- Step
3: Execute and display the output
✅ Demo 4: Running Java Program Using
Terminal
- Step
1: Open terminal
- Step
2: Navigate to Java file location
- Step
3: Compile: javac Hello.java
- Step
4: Run: java Hello
