Java Se Environment -

java -version javac -version Expected output (example):

export JAVA_HOME=/usr/lib/jvm/jdk-21 export PATH=$JAVA_HOME/bin:$PATH Then reload: source ~/.bashrc Open terminal/CMD and run: java se environment

javac HelloWorld.java # compiles → HelloWorld.class java HelloWorld # runs 6. Optional: Set CLASSPATH Only needed if using external .jar files or custom classes. java se environment