query: Null pointer exception thrown when trying to add things to a TreeMap
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 96453
negative_passages.text: Caught Throwable or Exception is null
negative_passages.docid: 13711
negative_passages.text: java.lang.NullPointerException at org.glassfish.hk2.classmodel.reflect.impl.TypesImpl.getType
negative_passages.docid: 137692
negative_passages.text: NullPointerException when working with arrays
negative_passages.docid: 149666
negative_passages.text: Why can't a null-reference exception name the object that has a null reference?
negative_passages.docid: 87189
negative_passages.text: System.NullPointerException
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: 113372
negative_passages.text: Using streams, how can I map the values in a HashMap?
negative_passages.docid: 114816
negative_passages.text: Is null reference possible?
negative_passages.docid: 149808
negative_passages.text: How can I add to List data structures?
negative_passages.docid: 10581
negative_passages.text: Avoiding NullPointerException in Java
negative_passages.docid: 153563
negative_passages.text: putExtra treeMap returns HashMap cannot be cast to TreeMap android
negative_passages.docid: 10818
negative_passages.text: NullPointerException : println needs a message in android
negative_passages.docid: 68247
negative_passages.text: Concurrent Modification Exception : adding to an ArrayList
negative_passages.docid: 58054
negative_passages.text: When is it OK to catch NullPointerException?
negative_passages.docid: 124773
negative_passages.text: NullPointerException when calling service in onResume