java - send and receive data from sockets

SocketUtils.java

package org.geo.utils;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.nio.charset.StandardCharsets;

public class SocketUtils {
    
    public SocketUtils() {
        super();
    }
    
    @SuppressWarnings("oracle.jdeveloper.java.nested-assignment")
    public static String getMessage(DataInputStream in) throws Exception {
        byte[] buff = new byte[10];
        int count = 0;
        
        while (count < 10)
            buff[count++] = in.readByte();
        
        String slen = new String(buff, StandardCharsets.US_ASCII);
        int len = Integer.valueOf(slen);
        
        count = 0;
        int offset = 0;
        byte[] bytes = new byte[len];
        
        while ((count = in.read(bytes, offset, len - offset)) != -1) {
            offset += count;
            
            if (offset >= len) {
              break;
            }
        }
        
        String line = new String(bytes, 0, offset, "UTF-8");
        
        return line;
    }
    
    public static void sendMessage(DataOutputStream out, String msg) throws Exception {
        String slen = String.format("%10d", msg.length()).replace(' ', '0');
        String message = slen + msg;
        
        out.write(message.getBytes(StandardCharsets.UTF_8));
        out.flush();
    }
}