query: Android java.lang.NullPointerException: lock == null
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 146476
negative_passages.text: Java: Why aren't NullPointerExceptions called NullReferenceExceptions?
negative_passages.docid: 29684
negative_passages.text: How to check if an object is nullable?
negative_passages.docid: 79586
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object
negative_passages.docid: 50208
negative_passages.text: Android startCamera gives me null Intent and ... does it destroy my global variable?
negative_passages.docid: 8808
negative_passages.text: Strange Java null behavior in Method Overloading
negative_passages.docid: 80631
negative_passages.text: NullPointerException but compiling?
negative_passages.docid: 128903
negative_passages.text: ExecuteScalar throws NullReferenceException
negative_passages.docid: 46944
negative_passages.text: Null pointer Exception - findViewById()
negative_passages.docid: 32065
negative_passages.text: Attempt to de-reference a null object: Trigger
negative_passages.docid: 47674
negative_passages.text: How to pass an object from one activity to another on Android
negative_passages.docid: 101059
negative_passages.text: Android - android.os.NetworkOnMainThreadException
negative_passages.docid: 115768
negative_passages.text: Loader lock error
negative_passages.docid: 77648
negative_passages.text: How to get the result of OnPostExecute() to main activity because AsyncTask is a separate class?
negative_passages.docid: 120566
negative_passages.text: Compare two objects in Java with possible null values
negative_passages.docid: 103797
negative_passages.text: Android:android.view.ViewRoot$CalledFromWrongThreadException - How to solve the problem?
negative_passages.docid: 31537
negative_passages.text: Checking for null before event dispatching... thread safe?