Server ping API

PingResponse.java

import com.google.gson.Gson;
import sun.misc.BASE64Decoder;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;

public class PingResponse {
    private Version version;
    private Players players;
    private String description;
    private String favicon;

    public Version getMinecraftVersion()
    {
        return version;
    }

    public Players getPlayers()
    {
        return players;
    }

    public String getDescription()
    {
        return description;
    }

    public String getFavicon()
    {
        try{
            return favicon.replace("data:image/png;base64,", "");
        }
        catch(Exception ex)
        {
            return null;
        }
    }

    public class Version
    {
        private String name;
        private int protocol;

        public String getName()
        {
            return name;
        }

        public int getProtocol()
        {
            return protocol;
        }
    }

    public class Players
    {
        private int max;
        private int online;
        private PingPlayer[] sample;

        public int getOnlinePlayers()
        {
            return online;
        }

        public int getMaxPlayers()
        {
            return max;
        }

        public PingPlayer[] getPlayerInfo()
        {
            return sample;
        }

        public class PingPlayer
        {
            private String name;
            private String id;

            public String getName()
            {
                return name;
            }

            public String getID()
            {
                return id;
            }

        }

    }

    public static PingResponse pingServer(String hostname, int port) throws IOException, UnknownHostException
    {
        Socket socket = new Socket(hostname, port);
        DataOutputStream doss = new DataOutputStream(socket.getOutputStream());
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DataOutputStream dos = new DataOutputStream(baos);
        dos.write(0x00);
        VarInt.writeVarInt(5, dos);
        VarInt.writeVarInt(hostname.length(), dos);
        dos.write(hostname.getBytes());
        dos.writeShort(port);
        VarInt.writeVarInt(1, dos);
        VarInt.writeVarInt(baos.toByteArray().length, doss);
        doss.write(baos.toByteArray());
        VarInt.writeVarInt(1, doss);
        doss.write(0x00);
        DataInputStream dis = new DataInputStream(socket.getInputStream());
        VarInt.readVarInt(dis);
        int id = dis.readByte();
        if(id != 0x00) return null;
        int length = VarInt.readVarInt(dis);
        byte[] jsonBa = new byte[length];
        dis.readFully(jsonBa);
        dis.close();
        doss.close();
        dos.close();
        socket.close();
        Gson gson = new Gson();
        return gson.fromJson(new String(jsonBa), PingResponse.class);
    }
}

VarInt.java

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

public class VarInt {

    public static void writeVarInt(int paramInt, DataOutputStream ser) throws IOException{
        while (true) {
            if ((paramInt & 0xFFFFFF80) == 0L) {
                ser.writeByte(paramInt);
                return;
            }

            ser.writeByte((paramInt & 0x7F) | 0x80);
            paramInt >>>= 7;
        }
    }

    public static int readVarInt(DataInputStream ser) throws IOException{
        int l = 0;
        int i = 0;
        while (true)
        {
            int j = ser.readByte();

            l |= (j & 0x7F) << i++ * 7;

            if (i > 10) {
                throw new RuntimeException("VarInt too big");
            }

            if ((j & 0x80) != 128) {
                break;
            }
        }

        return l;
    }
}