Complete Java Setup on Mac (2026) — JDK, JAVA_HOME, javac, jar
Complete Java setup on macOS with exact terminal commands.
Install JDK 21, verify java and javac, set JAVA_HOME, compile Hello.java, and package a jar.
Chapters
0:00 Intro
0:03 Install JDK 21
0:14 Verify java and javac
0:25 Set JAVA_HOME
0:36 Compile and run Hello.java
0:49 Package a jar
Commands
brew install --cask temurin
java --version
javac --version
/usr/libexec/java_home -V
which java
source ~/.zshrc
echo $JAVA_HOME
javac Hello.java
java Hello
jar --create --file hello.jar Hello.class
java -cp hello.jar Hello
ls -lh hello.jar
#java #jdk #javac #javahome #macos #temurin #installthat