Environment Variables In Java

Environment Variables  are variables that are added in any Operating system that can be accessed from anywhere in OS without using the complete(Real) location.

In a java Application System.getenv(); is used to find out the system environment variables

Example:-

import java.util.Map;

public class EnvMap {
    public static void main (String[] args) {
        Map<String, String> env = System.getenv();
        for (String envName : env.keySet()) {
            System.out.format("%s=%s%n",
                              envName,
                              env.get(envName));
        }
    }
}