query: Exception in thread "main" java.lang.NullPointerException [null]
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 121849
negative_passages.text: Exception in thread "main" java.lang.NoClassDefFoundError
negative_passages.docid: 103797
negative_passages.text: Android:android.view.ViewRoot$CalledFromWrongThreadException - How to solve the problem?
negative_passages.docid: 96046
negative_passages.text: Static fields on a null reference in Java
negative_passages.docid: 132398
negative_passages.text: What is null in Java?
negative_passages.docid: 22857
negative_passages.text: What does "Could not find or load main class" mean?
negative_passages.docid: 48391
negative_passages.text: "Main method not found" error when starting program?
negative_passages.docid: 58054
negative_passages.text: When is it OK to catch NullPointerException?
negative_passages.docid: 46944
negative_passages.text: Null pointer Exception - findViewById()
negative_passages.docid: 45196
negative_passages.text: Calling class method through NULL class pointer
negative_passages.docid: 94342
negative_passages.text: Java - class.getResource returns null
negative_passages.docid: 87189
negative_passages.text: System.NullPointerException
negative_passages.docid: 119573
negative_passages.text: NullPointerException in Java with no StackTrace
negative_passages.docid: 56124
negative_passages.text: Why do I get "Exception; must be caught or declared to be thrown" when I try to compile my Java code?
negative_passages.docid: 2116
negative_passages.text: IllegalArgumentException or NullPointerException for a null parameter?
negative_passages.docid: 46857
negative_passages.text: Compiler warning: null reference exception
negative_passages.docid: 80631
negative_passages.text: NullPointerException but compiling?