Lesson 0. Getting Started with Java: Hello World

1. Introduce yourself and tell us why you want to learn programming?

Please answer it on gist Java_01-1 if you have no github account, please create one right now.

2. Why Java?

• What’s programming languages?
• What’s different between Java and other languages?

Please do google research, look into at least 3 results. And answer the question base your understanding at gist Java_01-2

3. What you will learn from this class

• Java foundation
• Object Oriented Programming
• Data Structure and Algorithm
• Java Projects
• AP CSA practice

4. Found out what is the latest version of Java and how to install it

• hint: Java OpenJDK

I will post my answer on gist Java_01-4 after 2 mins.

5. Found out 5 Java Editors you like to try to use

• Java editor also call Java IDE (Integrated Development Environment)
• Please install VS Code
  • Getting Started with Java in VSCode
• (option) Install BlueJ for OODP part of this class
• Any other your school pc already installed

Please list 5 Java IDE (gist Java_01-05)

6. Build your first Java Program - “Hello World”

• Hello World example in W3school (java get start sample)

• Hellow world Code example

• BlueJ
  • Create and run Hello World program
  • Create a new Project in your IDE
  • Create a new Class with name “HelloWorld”
  • Add method to print string type variable
  • Compile your code
  • Create a instance of your Class “HelloWorld” with “ new HelloWorld()”
  • Run the code
• Command line Build and run the HelloWorld
  • Crate a static main method in the HelloWorld Class
  • Run Java in command line: ` java HelloWorld.java`
  • Build Java javac HelloWorld.java
  • Run HelloWorld.class file in command line ` java HelloWorld `
• VS Code set break point for debug

7 Home Work

• What’s the different of BlueJ from others Java IDEs? Put you answer as comments of gist Java_01-7

• Try some AI tool too see how you could learn programming

  • https://chatgpt.com/
  • https://gemini.google.com/app
  • https://www.perplexity.ai/ (Best AI tool for learning)
  • https://arena.lmsys.org/ (compare results any two ai,choice sus-column-r for Grok2)