query: NullPointerException in group class. can't find an array object
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 121864
negative_passages.text: Accessing members of items in a JSONArray with Java
negative_passages.docid: 80018
negative_passages.text: Accessing class members on a NULL pointer
negative_passages.docid: 8283
negative_passages.text: Why does null reference print as "null"
negative_passages.docid: 54938
negative_passages.text: Cannot invoke method or retrieve property from null object. Object returned by the following call stack is null. \"File\r\n\"
negative_passages.docid: 50046
negative_passages.text: java : non-static variable cannot be referenced from a static context Error
negative_passages.docid: 111535
negative_passages.text: Why does the ArrayList implementation use Object[]?
negative_passages.docid: 20020
negative_passages.text: NullPointerException accessing views in onCreate()
negative_passages.docid: 116636
negative_passages.text: How to get the Array Class for a given Class in Java?
negative_passages.docid: 15113
negative_passages.text: How to use an array list in Java?
negative_passages.docid: 131864
negative_passages.text: Member '' cannot be accessed with an instance reference
negative_passages.docid: 11537
negative_passages.text: What is IndexOutOfBoundsException? How can I fix it?
negative_passages.docid: 289
negative_passages.text: What is a NullReferenceException, and how do I fix it?
negative_passages.docid: 9683
negative_passages.text: How to use GetSObject to retrieve related data in a null safe manner?
negative_passages.docid: 10581
negative_passages.text: Avoiding NullPointerException in Java
negative_passages.docid: 131552
negative_passages.text: new ArrayList() failing in Java
negative_passages.docid: 46857
negative_passages.text: Compiler warning: null reference exception