environment variables for java code example

Example 1: set java home path

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

# Add JAVA bin directory to the PATH variable
export PATH=$PATH:$JAVA_HOME/bin

Example 2: gat environment variables java

String environmentVariable = System.getEnv("environment_variable_name"); 
//You can create environment variables on your computer manually
//and then you must put the environment variable in the parantheses as a String