query: Strange null pointer exception when using ConcurentHashMap (int java.lang.Object.hashCode())
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 73285
negative_passages.text: Null Pointer Exception in XMl Parsing
negative_passages.docid: 147879
negative_passages.text: Exception when taking a heapdump using JMAP
negative_passages.docid: 56124
negative_passages.text: Why do I get "Exception; must be caught or declared to be thrown" when I try to compile my Java code?
negative_passages.docid: 65689
negative_passages.text: getting exception while putting list data into the map
negative_passages.docid: 150361
negative_passages.text: Updating Java HashMap key
negative_passages.docid: 8277
negative_passages.text: Difference between HashMap, LinkedHashMap and TreeMap
negative_passages.docid: 98780
negative_passages.text: Test Method throwing null pointer exception on custom setting
negative_passages.docid: 62369
negative_passages.text: Iterate through a HashMap
negative_passages.docid: 146476
negative_passages.text: Java: Why aren't NullPointerExceptions called NullReferenceExceptions?
negative_passages.docid: 10818
negative_passages.text: NullPointerException : println needs a message in android
negative_passages.docid: 108024
negative_passages.text: What are the differences between a HashMap and a Hashtable in Java?
negative_passages.docid: 57929
negative_passages.text: How to read and write a HashMap to a file?
negative_passages.docid: 878
negative_passages.text: What issues should be considered when overriding equals and hashCode in Java?
negative_passages.docid: 96453
negative_passages.text: Caught Throwable or Exception is null
negative_passages.docid: 61972
negative_passages.text: LinkedHashMap in .NET
negative_passages.docid: 76350
negative_passages.text: Android:Passing a hash map between Activities