Java-ByteBuffer.remaining()问题

因此,我编写了如下代码:

    private static void serialize(ByteBuffer buffer, EmployeeData emp, CharsetEncoder encoder)
{
    // id
    buffer.putInt(emp.getId());
    
    CharBuffer nameBuffer = CharBuffer.wrap(emp.getFirstName().toCharArray());
    ByteBuffer nbBuffer = null;
    
    // length of first name
    try
    {
        nbBuffer = encoder.encode(nameBuffer);
    } 
    catch(CharacterCodingException e)
    {
        throw new ArithmeticException();
    }

    System.out.println(String.format("String [%1$s] #bytes = %2$s", emp.getFirstName(), nbBuffer.limit()));
    buffer.putInt(nbBuffer.limit());
    buffer.put(nbBuffer);

    // put lastname
    nameBuffer = CharBuffer.wrap(emp.getLastName().toCharArray());
    nbBuffer = null;
    
    // length of first name
    try
    {
        nbBuffer = encoder.encode(nameBuffer);          
    } 
    catch(CharacterCodingException e)
    {
        throw new ArithmeticException();
    }

    System.out.println(String.format("String [%1$s] #bytes = %2$s", emp.getLastName(), nbBuffer.limit()));
    buffer.putInt(nbBuffer.limit());
    buffer.put(nbBuffer);
    
    // salary
    buffer.putInt(emp.getSalary());
}

            Socket client = new Socket("localhost", 8080);
        
        OutputStream oStream = client.getOutputStream();

        serialize(buffer, emp, encoder);
        
        buffer.rewind();            
        while(buffer.hasRemaining())
        {
            byte temp = buffer.get();
            ++ written;
        }
        
        buffer.rewind();
        System.out.println("#Bytes in output buffer: " + written + " limit = " + buffer.limit() + " pos = " + buffer.position() + " remaining = " + buffer.remaining());
        
        int remaining = buffer.remaining();
        while(remaining > 0)
        {
            oStream.write(buffer.get());
            -- remaining;
        }

这就是我如何创建缓冲区。。。

        Charset charset = Charset.forName("UTF-8");
    CharsetDecoder decoder = charset.newDecoder();
    CharsetEncoder encoder = charset.newEncoder();
    byte [] underlyingBuffer = new byte[1024];
    ByteBuffer buffer = ByteBuffer.wrap(underlyingBuffer);
    buffer.order(ByteOrder.LITTLE_ENDIAN);

这是我得到的打印语句的输出。。。

字符串[John]#字节=4字符串[Smith]#字节=5

#输出缓冲区中的字节数:1024限制=1024位置=0剩余=1024

谢谢