query: Android - NullPointerException hashCode() on a null object Reference
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 143044
negative_passages.text: Object.hashCode() algorithm
negative_passages.docid: 878
negative_passages.text: What issues should be considered when overriding equals and hashCode in Java?
negative_passages.docid: 289
negative_passages.text: What is a NullReferenceException, and how do I fix it?
negative_passages.docid: 133055
negative_passages.text: Why do I need to override the equals and hashCode methods in Java?
negative_passages.docid: 114816
negative_passages.text: Is null reference possible?
negative_passages.docid: 79477
negative_passages.text: Why is "null" present in C# and Java?
negative_passages.docid: 8738
negative_passages.text: Should a retrieval method return 'null' or throw an exception when it can't produce the return value?
negative_passages.docid: 96046
negative_passages.text: Static fields on a null reference in Java
negative_passages.docid: 55274
negative_passages.text: Java: Exception itself is null
negative_passages.docid: 89487
negative_passages.text: Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
negative_passages.docid: 94972
negative_passages.text: Java Array HashCode implementation
negative_passages.docid: 73285
negative_passages.text: Null Pointer Exception in XMl Parsing
negative_passages.docid: 11458
negative_passages.text: NullReferenceException in Unity
negative_passages.docid: 76350
negative_passages.text: Android:Passing a hash map between Activities
negative_passages.docid: 10818
negative_passages.text: NullPointerException : println needs a message in android
negative_passages.docid: 81518
negative_passages.text: Find out what variable is throwing a NullPointerException programmatically