java socket client

import java.io.*;
import java.net.*;

public class SocketTest{
    SocketTest(){}
    void test()
    {
        try{
            Socket requestSocket = new Socket("xxx.xxx.xxx.xxx", 60006);
            OutputStream out = requestSocket.getOutputStream();
            InputStream in = requestSocket.getInputStream();

            byte[] bb = new byte[16] ;
            for(int i =0;i<13;i++)
            {
                bb[i+3]=(byte)((int)‘a‘+i);
            }
            bb[0]=(byte)0x00;
            bb[1]=(byte)0x0e;
            bb[2]=(byte)0xaa;
            bb[15]=(byte)0xfe;
            System.out.println("client>"+new String(bb));
            
            out.write(bb);
            out.flush();

            byte[] buffer = new byte[1024];
            in.read(buffer);
            String responseStr = new String(buffer);
            System.out.println("server>"+responseStr);

            out.close();
            in.close();

            requestSocket.close();
        }
        catch(IOException ioException){
            ioException.printStackTrace();
        }
        // catch(ClassNotFoundException classNot){
        //     System.err.println("data received in unknown format");
        // }

    }

    public static void main(String args[])
    {
        SocketTest client = new SocketTest();
        client.test();
    }
}