CODEWITHSUNDEEP
javabufferedinputstream
vico
vico

Reputation: 18171

Reading byte[] from BufferedInputStream

Wondering regarding code below that reads data from TCP Socket BufferedInputStream. Is there any reason read first byte with int s = _in.read() and later rest ones _in.read(byteData);. Can I read just byte[] without using first read line?

private static String readInputStream(BufferedInputStream _in) throws IOException 
{
    String data = "";
    int s = _in.read();
    if(s==-1)
        return null;
    data += ""+(char)s;
    int len = _in.available();
    System.out.println("Len got : "+len);
    if(len > 0) {
        byte[] byteData = new byte[len];
        _in.read(byteData);
        data += new String(byteData);
    }
    return data;
}

Upvotes: 0

Views: 1922

Answers (2)

Maciek Dowgiałło
Maciek Dowgiałło

Reputation: 11

You should not rely on calling available() to find out the Stream's length as it returns only estimation. If you want to read all bytes, do it in a loop like this:

String data = "";
byte[] buffer = new byte[1024];
int read;
while((read = _in.read(buffer)) != -1) {
   data += new String(buffer, 0, read);    
}

Upvotes: 1

sandip
sandip

Reputation: 129

You can use skip method of BufferedInputStream to skip anynumber of bytes as you want. Like you can add into your code as following

 _in.skip(1);
  int len = _in.available();
  System.out.println("Len got : "+len);
  if(len > 0) {
    byte[] byteData = new byte[len];
    _in.read(byteData);
    data += new String(byteData);
 }
return data;

Upvotes: 0

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