query: HashMap: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.util.HashMap.put'
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 21340
negative_passages.text: Adding  causes java.lang.IllegalStateException: Cannot create a session after the response has been committed
negative_passages.docid: 64200
negative_passages.text: Can Java's NullPointerException be changed to report on which variable was null?
negative_passages.docid: 101146
negative_passages.text: Why can't I write Nullable>?
negative_passages.docid: 89342
negative_passages.text: How to putAll on Java hashMap contents of one to another, but not replace existing keys and values?
negative_passages.docid: 73285
negative_passages.text: Null Pointer Exception in XMl Parsing
negative_passages.docid: 73120
negative_passages.text: Nullpointerexception when trying to send data from activity to class
negative_passages.docid: 23317
negative_passages.text: How do I fix a NoSuchMethodError?
negative_passages.docid: 87728
negative_passages.text: ArgumentNullException or NullReferenceException from extension method?
negative_passages.docid: 138618
negative_passages.text: How to resolve NullPointerException error in my below POM code?
negative_passages.docid: 87189
negative_passages.text: System.NullPointerException
negative_passages.docid: 11458
negative_passages.text: NullReferenceException in Unity
negative_passages.docid: 68247
negative_passages.text: Concurrent Modification Exception : adding to an ArrayList
negative_passages.docid: 113372
negative_passages.text: Using streams, how can I map the values in a HashMap?
negative_passages.docid: 37988
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object:
negative_passages.docid: 66284
negative_passages.text: NullPointerException when Creating an Array of objects
negative_passages.docid: 24676
negative_passages.text: What is the preferred/idiomatic way to insert into a map?