query: Null pointer exception java index comparison
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 141442
negative_passages.text: Why does my string comparison fail?
negative_passages.docid: 5640
negative_passages.text: How to check a string against null in java?
negative_passages.docid: 16864
negative_passages.text: Where is Java's Array indexOf?
negative_passages.docid: 122494
negative_passages.text: Comparison Method violates its general contract in Java 7
negative_passages.docid: 148619
negative_passages.text: Is there a reason not to use  (null safe equals operator) in mysql instead of =?
negative_passages.docid: 16402
negative_passages.text: java Long datatype comparison
negative_passages.docid: 114816
negative_passages.text: Is null reference possible?
negative_passages.docid: 33772
negative_passages.text: Is there any difference in equals and == for String variables?
negative_passages.docid: 79586
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object
negative_passages.docid: 128865
negative_passages.text: The equals() method in Java works unexpectedly on Long data type
negative_passages.docid: 120071
negative_passages.text: Checking for a null int value from a Java ResultSet
negative_passages.docid: 44820
negative_passages.text: java int comparation
negative_passages.docid: 113187
negative_passages.text: Comparing Java enum members: == or equals()?
negative_passages.docid: 64332
negative_passages.text: avoiding null reference exceptions
negative_passages.docid: 60078
negative_passages.text: Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 11
negative_passages.docid: 135196
negative_passages.text: ArrayIndexOutOfBoundsException when iterating through all the elements of an array