Simple java program to output system and environment variables

HelloWorld.java

import java.util.Map;
import java.util.Properties;

public class HelloWorld
{
  public static void main(String[] args)
  {
    
    System.out.println("---------Environment Variables----------");
    
	  Map<String, String> envs = System.getenv();
  	for(Map.Entry<String,String> entry : envs.entrySet()) {
  	    System.out.println(entry.getKey() + "=" + entry.getValue());
  	}
	
  	System.out.println("---------System Properties----------");
  
    System.out.println("user.home: "+System.getProperty("user.home"));
    Properties props = System.getProperties();
	  props.list(System.out);
  }
}