java - Null pointer Exception in Uploading the xml file -

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i have following code:

l2schemahandler handler = getschemahandler();          // validate xmlformatvalidator validator = new xmlformatvalidator(handler.elements, handler.types, handler.root);      inputstream schemainput = new fileinputstream(new file(xmlfilepath));  saxparserfactory spfactory = saxparserfactory.newinstance(); spfactory.setfeature("http://xml.org/sax/features/namespaces", true);  saxparser parser = spfactory.newsaxparser();  //this line gives null pointer exception parser.parse(schemainput, validator);  report.addall(validator.getreport()); this.objectslist = validator.getobjectlist(); // when know objects valid, duplicate objects db if(report.isempty())     duplicateobjectsmap    = validateobjectid(validator.getobjects(),report);     // here need check whether object id's exists in db if(report.isempty()){//if no errors have occurred    //        if(validateobjectid(validator.getobjects(),report))         validateobjectsfromfile(validator.getobjects(), report , msgreport); }

the marked line gives null pointer exception while parser, schemainput , validator contaning objects not null value.

why line gives null pointer exception?

to use validating parser, make following changes:

spfactory.setvalidating(true);

by default value of set false.


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