Un expected behaviour when reading from inputstream

[adoorsarath]

sir,

we all know that when we read from an inputstream using read()

method of the InputStream class,it should return -1 when end of the

stream reaches.

In my case when I try to read from the InputStream of a serial port,it

blocks instead of returning -1 (when reaches end of stream) and returns the

data when it available.

Do any one know the answer,please help me.

thanks in advance,

Adoorsarath

[cecily]

Can you write the code?

[adoorsarath]

Code:

class ModemReader extends Thread {
  InputStream in=SimpleSMSReader.inputStream;
  int c;
  public void run() {try {while(true) {
	    if(SimpleSMSReader.readMessage==true) {
		c=in.read();
		while (c != -1)
		{
                               queue.put((byte) c);
                               c = in.read();
       	             }				                   
                          SimpleSMSReader.readMessage=false;
                          //Here i have to write some code to parse the message.
                         // ie.. only after reading the whole data available.
                        //but in this case it is not exiting from the loop instead 
                        // it waits for another data availability.and reads when 
                         //   data available.
	       }
	  }

            }catch(Exception e) {
	     System.out.println(e.toString());
            }
    }

}

description:

When some data is available in the inputStream,the static variable readMessage in the class SimpleSMSReader is set to True.

[Heather]

I recommend to you to read the api very carefully
InputStream (Java 2 Platform SE v1.4.2))