public class Env { public static void main (String[] args) { for (String env: args) { String value = System.getenv(env); if (value != null) { System.out.format("%s=%s%n", env, value); } else { System.out.format("%s is" + " not assigned.%n", env); } } } }
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