query: Need help in my code (Error: NullPointerException when accessing map's key)
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 68500
negative_passages.text: hashCode() for an array of objects for use in HashMap
negative_passages.docid: 10581
negative_passages.text: Avoiding NullPointerException in Java
negative_passages.docid: 141129
negative_passages.text: InputStream returning NullPointerException (Java)
negative_passages.docid: 23964
negative_passages.text: Why does Java have a "NullPointerException" when there are no pointers in Java?
negative_passages.docid: 9396
negative_passages.text: NullPointerException on AlarmManager.setRepeating() - ElapsedRealTime - Android
negative_passages.docid: 137692
negative_passages.text: NullPointerException when working with arrays
negative_passages.docid: 19444
negative_passages.text: Changing HashMap keys during iteration
negative_passages.docid: 55274
negative_passages.text: Java: Exception itself is null
negative_passages.docid: 98866
negative_passages.text: Null Pointer Exception on getGraphics()
negative_passages.docid: 24452
negative_passages.text: How to use Map inside MapThread?
negative_passages.docid: 130819
negative_passages.text: Nullpointerexception while setting a bean
negative_passages.docid: 51586
negative_passages.text: Using two (or more) objects as a HashMap key
negative_passages.docid: 37988
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object:
negative_passages.docid: 147879
negative_passages.text: Exception when taking a heapdump using JMAP
negative_passages.docid: 79586
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object
negative_passages.docid: 132398
negative_passages.text: What is null in Java?