I need help with a lock

Question

i have two methods
synchronized parsedata(){}
and
synchronized savedata(){}
they are synchronized because they use the same bufferedReader. However when a button on the gui is pressed i want parsedata to give up it's lock, but it never does. This only happens when i stop streaming data to the bufferedReader. If I keep streaming the data then the lock does release, however that isn't helpful, I need it to unlock when there is no more streaming data. Any help would be greatly appreciated. Thanx.

Answer 1

Okay here is a short version of both methods
in_data = new BufferedReader();
synchronized public void parsedata()
String newdata = in_data.readLine();
StringTokenizer st = new StringTokenizernewdata, "=");
command = st.nextToken();
/* Decode received data */
if((command.compareTo("DATA")) == 0)
try
for(int i = 0; i < block_size; i++)
value1 = st.nextToken();
//point count determines where we should be in the buffer
if(data_value1 != point_count)
for(int l = point_count; l < data_value1; l++)
// Fill Buffer A for writing data to the output file.
main_index_array[point_count] = -1;
point_count++;
} //end for
} //end if
/* Save data to InputDataBuffer */
main_index_array[point_count] = data_value1;
point_count++;
elseif(command == "BUTTON")
//do something else
synchronized public void savedata()
for(int i = 0; i < point_count; i++)
if(main_index_array[i] == -1)
String newdata = null;
while(newdata == null)
newdata = in_data.readLine(); // get some input
try
StringTokenizer st = new StringTokenizer(newdata, "=");
command = st.nextToken();
/* Decode received data */
if((command.compareTo("DATA")) == 0)
for(int j = 0; j < block_size; j++)
value1 = st.nextToken();
data_value1 = Integer.valueOf(value1).intValue();
outfile.println("" + data_value1);
} //end for
i = i + block_size -1;
} //end if
} //end try
catch(Exception io)
textField1.setText("no data yet");
} //end while
} //end if
else
outfile.println("" + main_index_array);
so as you can see i only try to read from the same bufferedReader if I am missing data. The problem I get is that the parsedata() routine seems to hang in the loop searching for data. If the parse recieves some command like button for example the parse finishes, releases the lock and goes on, however if it never recieves a command after the data has stopped streaming it doesn't release the lock. Thanx for your help