HttpInputStream works strange..!!!

Question

My program is reading HTML using HttpURLconnection. The inputstream read from HttpURLConnection is converted to a string. The code looks like the following.!!
static private String inputStreamToString (InputStream is){
''''StringBuffer sb = new StringBuffer();
''''int d=-1;
''''try{
''''''''d=is.read();
''''''''while(d != -1){
''''''''''''sb.append(String.valueOf((char)d));
''''''''''''d = is.read(); <----------------- stuck here
''''}catch(IOException e){
''''''''e.printStackTrace();
''''return sb.toString();
But the problem is after reading several pages suddenly the java program doesn't do anything, it doesn't consume any CPU time( means no infinite loop ). It looks like the process is sleeping.
Does anybody know what is going on???
thank you

Answer 1

Use public int available() before calling read() to ensure that there is data in the stream. Otherwise read() blocks until new data is received.