query: NullPointerException: Attempt to invoke virtual method on a null object reference?
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 10818
negative_passages.text: NullPointerException : println needs a message in android
negative_passages.docid: 134746
negative_passages.text: Where do "pure virtual function call" crashes come from?
negative_passages.docid: 108336
negative_passages.text: Nullable Object must have a value #2
negative_passages.docid: 10581
negative_passages.text: Avoiding NullPointerException in Java
negative_passages.docid: 107423
negative_passages.text: After ExecuteScalar: Object reference not set etc
negative_passages.docid: 96046
negative_passages.text: Static fields on a null reference in Java
negative_passages.docid: 53319
negative_passages.text: ArgumentException or ArgumentNullException for string parameters?
negative_passages.docid: 42612
negative_passages.text: Generics, arrays, and the ClassCastException
negative_passages.docid: 32065
negative_passages.text: Attempt to de-reference a null object: Trigger
negative_passages.docid: 141129
negative_passages.text: InputStream returning NullPointerException (Java)
negative_passages.docid: 89755
negative_passages.text: Why is "throw null" not creating a compilation error in Java?
negative_passages.docid: 92797
negative_passages.text: How to debug NullPointerException in selenium-java
negative_passages.docid: 144423
negative_passages.text: "No enclosing instance of type" error while calling method from another class in Android
negative_passages.docid: 145465
negative_passages.text: Why can't static_cast be used to down-cast when virtual inheritance is involved?
negative_passages.docid: 50046
negative_passages.text: java : non-static variable cannot be referenced from a static context Error
negative_passages.docid: 80018
negative_passages.text: Accessing class members on a NULL pointer