query: checking object reference for null in if statement along with other object's methods
positive_passages.docid: 56685
positive_passages.text: Java logical operator short-circuiting
negative_passages.docid: 35129
negative_passages.text: Why does String.valueOf(null) throw a NullPointerException?
negative_passages.docid: 109876
negative_passages.text: In the msdn guidance on Equals override, why the cast to object in the null check?
negative_passages.docid: 641
negative_passages.text: Which overload will get selected for null in Java?
negative_passages.docid: 109927
negative_passages.text: JavaScript null check
negative_passages.docid: 26674
negative_passages.text: Is there any way other than instanceof operator for object type comparison in java?
negative_passages.docid: 155686
negative_passages.text: What is a reason of placing boolean or null before comparison operator?
negative_passages.docid: 123797
negative_passages.text: Not equal  != operator on NULL
negative_passages.docid: 127452
negative_passages.text: Why is typeof null "object"?
negative_passages.docid: 148793
negative_passages.text: Checking Textbox Text for Null
negative_passages.docid: 46857
negative_passages.text: Compiler warning: null reference exception
negative_passages.docid: 146476
negative_passages.text: Java: Why aren't NullPointerExceptions called NullReferenceExceptions?
negative_passages.docid: 39781
negative_passages.text: Why does the is operator return false when given null?
negative_passages.docid: 576
negative_passages.text: How can I check for an empty/undefined/null string in JavaScript?
negative_passages.docid: 12827
negative_passages.text: Are nullable types reference types?
negative_passages.docid: 81624
negative_passages.text: Is returning null bad design?
negative_passages.docid: 81518
negative_passages.text: Find out what variable is throwing a NullPointerException programmatically