Minecraft Server Query CLI program.

Main.java

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;

public class Main {

  public static void main(String[] args) {
    if (args.length < 2) {
      String[] query = minecraftQuery(args[0]);
      System.out.println(query[0]);
      System.out.println(query[1]);
      System.out.println(query[2]);
      System.out.println(query[3]);
      System.out.println(query[4]);
    } else if (args.length > 1) {
      String[] query = minecraftQuery(args[0], Integer.parseInt(args[1]));
      System.out.println(query[0]);
      System.out.println(query[1]);
      System.out.println(query[2]);
      System.out.println(query[3]);
      System.out.println(query[4]);
    }

  }

  public static String[] minecraftQuery(String address) {
    return minecraftQuery(address, 25565);
  }

  public static String[] minecraftQuery(String address, int port) {
    byte fe1 = (byte) 0xFE;
    byte fe2 = (byte) 0x01;
    byte[] fe = {fe1, fe2};
    Socket socket = null;
    try {
      socket = new Socket(address, port);
      BufferedReader is = new BufferedReader(new InputStreamReader(socket.getInputStream()));
      BufferedOutputStream os = new BufferedOutputStream(socket.getOutputStream());
      os.write(fe);
      os.flush();
      String response = is.readLine();
      response = response.substring(9);
      String[] data = response.split("\\u0000\\u0000");
      String[] output = new String[5];
      int i = 0;
      for (String Data : data) {
        String after = Data.trim().replaceAll("\u0000+", "");
        if (after == null || after == "") {
          continue;
        }
        output[i] = after;
        i++;

      }
      output[0] = "Protocol:   " + output[0];
      output[1] = "Version:    " + output[1];
      output[2] = "MOTD:       " + output[2];
      output[3] = "Players:    " + output[3];
      output[4] = "Maxplayers: " + output[4];
      return output;
    } catch (IOException e) {
      e.printStackTrace();
      return null;
    }
  }
}