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Home/ Questions/Q 8810507
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Editorial Team
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Editorial Team
Asked: June 14, 20262026-06-14T03:08:09+00:00 2026-06-14T03:08:09+00:00

Problem I read first byte in my socket client to check connection: ByteBuffer b

  • 0

Problem

I read first byte in my socket client to check connection:

ByteBuffer b = ByteBuffer.allocate(4);
b.order(ByteOrder.BIG_ENDIAN);
...
int dataInt = clientSocket.getInputStream().read();

Documentation:

Reads a single byte from this stream and returns it as an integer in
the range from 0 to 255. Returns -1 if the end of the stream has been
reached.

after that I want to splice this byte with next input string. I convert this integer byte to characters

b.putInt(dataInt);
byte[] dataByte = b.array();
final String data;

and check it. If dataInt != -1, I have to return this croped byte into new string:

if(dataInt != -1)
{
    String c = new String(dataByte);
    Log.v("MSG", c);
    data = c + inToServer.readLine();
}
else
{
    data = inToServer.readLine();
}

Why I see in log “MSG, ������MY MESSAGE”? How to get a string correctly?


Upd, how I send my messages:

byte[] buf = str.getBytes("UTF-8");
outToServer.write(buf, 0, buf.length);
outToServer.writeBytes("\n");
outToServer.flush();
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1 Answer

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  1. Editorial Team
    Editorial Team
    2026-06-14T03:08:10+00:00Added an answer on June 14, 2026 at 3:08 am

    Omg, I did it.
    Solution:

    byte[] b1 = new byte[1];
    int dataInt = clientSocket.getInputStream().read();
    b1[0] = (byte)dataInt;
    
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