query: Arraylist is null; I cannot access books in the arraylist
positive_passages.docid: 126
positive_passages.text: How do I compare strings in Java?
negative_passages.docid: 33838
negative_passages.text: Java - How to write ArrayList Objects into txt file?
negative_passages.docid: 141129
negative_passages.text: InputStream returning NullPointerException (Java)
negative_passages.docid: 73924
negative_passages.text: Create an Array of Arraylists
negative_passages.docid: 55274
negative_passages.text: Java: Exception itself is null
negative_passages.docid: 79586
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object
negative_passages.docid: 138618
negative_passages.text: How to resolve NullPointerException error in my below POM code?
negative_passages.docid: 33474
negative_passages.text: I can read from /dev/null; how to fix it?
negative_passages.docid: 104935
negative_passages.text: Java ArrayList add() method in the instance variable section
negative_passages.docid: 68787
negative_passages.text: Why The constructor ArrayAdapter(new View.OnKeyListener(){}, int, String[]) is undefined
negative_passages.docid: 143104
negative_passages.text: Android java.io.File.listFiles() not working properly in Environment.getDataDirectory()
negative_passages.docid: 64200
negative_passages.text: Can Java's NullPointerException be changed to report on which variable was null?
negative_passages.docid: 154262
negative_passages.text: List has no rows for assignment to SObject
negative_passages.docid: 98866
negative_passages.text: Null Pointer Exception on getGraphics()
negative_passages.docid: 119799
negative_passages.text: Android: Issue during Arraylist declaration
negative_passages.docid: 33103
negative_passages.text: How come invoking a (static) method on a null reference doesn't throw NullPointerException?
negative_passages.docid: 146476
negative_passages.text: Java: Why aren't NullPointerExceptions called NullReferenceExceptions?