Program to demonstrate how to get information about the Environment Variables used through a Java program.
Output of the program :
package com.hubberspot.environmentVariables; import java.util.Map; import java.util.Set; public class EnvironmentVariablesDemo { public static void main(String[] args) { // In order to get information about the environment variables // used we call java.lang.System class's getenv() method // It retirns back a map storing environment variable name and // value Map < String, String > environmentVariableMap = System.getenv(); // We get all the names of environment variables as a set // using keySet() method of map of environment variables Set < String > keySet = environmentVariableMap.keySet(); // We loop each and every element of the map // and print the name and value of the environment variables for(String environmentKey : keySet){ String environmentValue = environmentVariableMap.get(environmentKey); System.out.println(environmentKey + " = " + environmentValue); } } }
Output of the program :