query: Common class occasionally returns null value
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 38241
negative_passages.text: How do I check for nulls in an '==' operator overload without infinite recursion?
negative_passages.docid: 2772
negative_passages.text: Is there a "null coalescing" operator in JavaScript?
negative_passages.docid: 109442
negative_passages.text: How to deal with cross-thread access exceptions?
negative_passages.docid: 134689
negative_passages.text: Setting an object to null vs Dispose()
negative_passages.docid: 28648
negative_passages.text: Will new return NULL in any case?
negative_passages.docid: 54143
negative_passages.text: Why is the default value of the string type null instead of an empty string?
negative_passages.docid: 140738
negative_passages.text: Does setting Java objects to null do anything anymore?
negative_passages.docid: 28371
negative_passages.text: Why is nullglob not default?
negative_passages.docid: 114816
negative_passages.text: Is null reference possible?
negative_passages.docid: 19902
negative_passages.text: Shortcut for "null if object is null, or object.member if object is not null"
negative_passages.docid: 95621
negative_passages.text: Why do constructors not return values?
negative_passages.docid: 58054
negative_passages.text: When is it OK to catch NullPointerException?
negative_passages.docid: 94342
negative_passages.text: Java - class.getResource returns null
negative_passages.docid: 143243
negative_passages.text: Is NULL always false?
negative_passages.docid: 67597
negative_passages.text: Can constructor return a null object?
negative_passages.docid: 8738
negative_passages.text: Should a retrieval method return 'null' or throw an exception when it can't produce the return value?