query: NullPointerException in Tree?
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 80018
negative_passages.text: Accessing class members on a NULL pointer
negative_passages.docid: 33103
negative_passages.text: How come invoking a (static) method on a null reference doesn't throw NullPointerException?
negative_passages.docid: 97325
negative_passages.text: DialogFragment causing nullpointer crash
negative_passages.docid: 32065
negative_passages.text: Attempt to de-reference a null object: Trigger
negative_passages.docid: 98780
negative_passages.text: Test Method throwing null pointer exception on custom setting
negative_passages.docid: 58054
negative_passages.text: When is it OK to catch NullPointerException?
negative_passages.docid: 53319
negative_passages.text: ArgumentException or ArgumentNullException for string parameters?
negative_passages.docid: 6882
negative_passages.text: try catch exception always returns null
negative_passages.docid: 37446
negative_passages.text: How to implement a tree data-structure in Java?
negative_passages.docid: 153563
negative_passages.text: putExtra treeMap returns HashMap cannot be cast to TreeMap android
negative_passages.docid: 73120
negative_passages.text: Nullpointerexception when trying to send data from activity to class
negative_passages.docid: 2116
negative_passages.text: IllegalArgumentException or NullPointerException for a null parameter?
negative_passages.docid: 96843
negative_passages.text: What will happen when I call a member function on a NULL object pointer?
negative_passages.docid: 103797
negative_passages.text: Android:android.view.ViewRoot$CalledFromWrongThreadException - How to solve the problem?
negative_passages.docid: 23964
negative_passages.text: Why does Java have a "NullPointerException" when there are no pointers in Java?
negative_passages.docid: 42958
negative_passages.text: Method Overloading for null argument