Get Environment varibales in java

import java.util.Map;

public class TestDemo {

public static void main(String[] args) {

String user = System.getProperty(“”) ;  /*getting username using System.getProperty in Java */
System.out.println(“Username using system property: ”  + user);

String userWindows = System.getenv(“USERNAME”); /* getting username as environment variable in java, only works in windows */
System.out.println(“Username using environment variable in windows : ”  + userWindows);

//name and value of all environment variable in Java  program
Map<String, String> env = System.getenv();
for (String envName : env.keySet()) {
System.out.format(“%s=%s%n”, envName, env.get(envName));



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