query: android studio firebase error null reference when i try to read information
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 138618
negative_passages.text: How to resolve NullPointerException error in my below POM code?
negative_passages.docid: 96046
negative_passages.text: Static fields on a null reference in Java
negative_passages.docid: 98908
negative_passages.text: Is it good practice to set variables to null when they are no longer needed?
negative_passages.docid: 67597
negative_passages.text: Can constructor return a null object?
negative_passages.docid: 80631
negative_passages.text: NullPointerException but compiling?
negative_passages.docid: 96311
negative_passages.text: NullPointerException when installing the Android SDK on Mac OS X
negative_passages.docid: 114349
negative_passages.text: What is a null-terminated string?
negative_passages.docid: 13711
negative_passages.text: java.lang.NullPointerException at org.glassfish.hk2.classmodel.reflect.impl.TypesImpl.getType
negative_passages.docid: 108336
negative_passages.text: Nullable Object must have a value #2
negative_passages.docid: 119573
negative_passages.text: NullPointerException in Java with no StackTrace
negative_passages.docid: 55830
negative_passages.text: What's the rationale for null terminated strings?
negative_passages.docid: 88920
negative_passages.text: Is using NULL references OK?
negative_passages.docid: 58054
negative_passages.text: When is it OK to catch NullPointerException?
negative_passages.docid: 10818
negative_passages.text: NullPointerException : println needs a message in android
negative_passages.docid: 124773
negative_passages.text: NullPointerException when calling service in onResume
negative_passages.docid: 54143
negative_passages.text: Why is the default value of the string type null instead of an empty string?