/**
 * Server entry
 */
import java.util.*;
 public class GameServer{
     public static void main(String args[]){
        System.out.println("Hello, this is server");
     }
 }
/**
 * Server entry
 */
import java.util.*;
 public class GameServer{
     public static void main(String args[]){
        System.out.println("Hello, this is server");
      
     }
 }

Update GameServer.java