Why not use Go? I’ll have to learn Kotlin later anyway.

Installation and Environment Setup

winget install Oracle.JDK.17 --location [Installation Destination]

Windows command line option.

You can also download OpenJDK from Tsinghua mirror.

Setting Environment Variables

• After installing JDK, set JAVA_HOME environment variable pointing to the JDK installation directory.
• Windows setup: Find JDK directory like C:\Program Files\Java\jdk-17, create JAVA_HOME variable with this path.
• Add bin directory to PATH: Path=%JAVA_HOME%\bin;<existing paths>
• Verify with java -version

IntelliJ IDEA

IntelliJ IDEA tutorial: https://www.youtube.com/watch?v=yefmcX57Eyg

Common shortcuts: https://blog.jetbrains.com/idea/2020/03/top-15-intellij-idea-shortcuts/

Java Basics

Object-oriented programming that I’ve been avoiding is here again.

Ended up watching Heima tutorials.

Object-Oriented

Inheritance

• extends is for extending a class
• implements is for implementing an interface

Override vs Overload

Override: Subclass rewrites parent’s method, same signature Overload: Same method name, different parameters

Cross-Origin Issues

Cross-origin problem is caused by browser’s same-origin policy. Same origin means: same protocol + domain + port.