query: JavaMail message.getSubject().equals gives NullPointerException
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 119573
negative_passages.text: NullPointerException in Java with no StackTrace
negative_passages.docid: 124471
negative_passages.text: Comparing nullable column values using "IS NULL" versus "= NULL"
negative_passages.docid: 63172
negative_passages.text: Checking a null value in Objective-C that has been returned from a JSON string
negative_passages.docid: 37988
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object:
negative_passages.docid: 138618
negative_passages.text: How to resolve NullPointerException error in my below POM code?
negative_passages.docid: 127452
negative_passages.text: Why is typeof null "object"?
negative_passages.docid: 142913
negative_passages.text: How do you get the "object reference" of an object in java when toString() and hashCode() have been overridden?
negative_passages.docid: 128865
negative_passages.text: The equals() method in Java works unexpectedly on Long data type
negative_passages.docid: 45333
negative_passages.text: SingleEmailMessage sending isn't working when called from Unit Test
negative_passages.docid: 85964
negative_passages.text: Android: ClassNotFoundException when passing serializable object to Activity
negative_passages.docid: 66284
negative_passages.text: NullPointerException when Creating an Array of objects
negative_passages.docid: 134644
negative_passages.text: Compare two objects with .equals() and == operator
negative_passages.docid: 100746
negative_passages.text: Working with a Java Mail Server for Testing
negative_passages.docid: 103930
negative_passages.text: How to ensure hashCode() is consistent with equals()?
negative_passages.docid: 109282
negative_passages.text: Java comparison with == of two strings is false?
negative_passages.docid: 10818
negative_passages.text: NullPointerException : println needs a message in android