android - How can i turn Stringbuilder variable to a long? -

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// text file         file file = new file(environment.getexternalstoragedirectory()                 + "/config/gpslistenermintime.cfg");          // read text file         stringbuilder gpslistenermintime = new stringbuilder();         try {             bufferedreader br = new bufferedreader(new filereader(file));             string line;              while ((line = br.readline()) != null) {                 gpslistenermintime.append(line);                 gpslistenermintime.append('\n');              }         } catch (ioexception e) {             // todo you'll need add proper error handling here         }

i want read number file code , works well, how can use number long value in requestlocationupdates? tried use way not working:

        lm = (locationmanager) getsystemservice(context.location_service);         lm.requestlocationupdates(locationmanager.gps_provider, long.valueof(string.valueof(gpslistenermintime)), 0, this);

my file contains number: 10000 error when staring service:

  08-07 15:32:45.599: e/androidruntime(19878): java.lang.runtimeexception: unable create service com.example.gpslog.datalogservice: java.lang.numberformatexception: 10000

numberformatexception result of parsing "1000/n" string. remove empty characters trim() method : 

long.valueof(yourstringbuilder.tostring().trim());

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