caused by:java.lang.IllegalStateException:Expected Begin_object but is STRING at line 1 column 3939

When parsing JSON data using Gson, error: caused by:java.lang.IllegalStateException:Expected begin_object but is STRING at line 1 column 3939

Cause: There is a problem with the incoming parameter;

 while ((Len=inputstream.read (data))!=-1) {            outputstream.write (data,0, Len);        }

Wrongly written:

 while ((Len=inputstream.read ())!=-1) {            outputstream.write (data,0, Len);        }

Lead:

String jsonstring=httputils.getjsoncontent (path);            System.out.println ("JSONSTRING-->:" +jsonstring.tostring ());            Person Person =gsontools.getperson (Jsonstring.trim (), person.  Class);

The jsonstring parameter in the upper segment of the Gsontools.getperson is problematic, causing an error

caused by:java.lang.IllegalStateException:Expected Begin_object but is STRING at line 1 column 3939