query: How can I solve "Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' 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: 55274
negative_passages.text: Java: Exception itself is null
negative_passages.docid: 68713
negative_passages.text: Why is it Valid to Concatenate Null Strings but not to Call "null.ToString()"?
negative_passages.docid: 48221
negative_passages.text: Solving "The ObjectContext instance has been disposed and can no longer be used for operations that require a connection" InvalidOperationException
negative_passages.docid: 69771
negative_passages.text: NullPointerException when setting attribute?
negative_passages.docid: 18250
negative_passages.text: What could cause java.lang.reflect.InvocationTargetException?
negative_passages.docid: 73120
negative_passages.text: Nullpointerexception when trying to send data from activity to class
negative_passages.docid: 33103
negative_passages.text: How come invoking a (static) method on a null reference doesn't throw NullPointerException?
negative_passages.docid: 20892
negative_passages.text: C# nullable string error
negative_passages.docid: 85964
negative_passages.text: Android: ClassNotFoundException when passing serializable object to Activity
negative_passages.docid: 135931
negative_passages.text: What does "Method '~' of object '~' failed" at runtime mean?
negative_passages.docid: 139395
negative_passages.text: com.sun.istack.SAXException2 : Instance ... is substituting "java.lang.Object", but ... is bound to an anonymous type
negative_passages.docid: 28147
negative_passages.text: java: (String[])List.toArray() gives ClassCastException
negative_passages.docid: 79477
negative_passages.text: Why is "null" present in C# and Java?
negative_passages.docid: 101146
negative_passages.text: Why can't I write Nullable>?
negative_passages.docid: 80631
negative_passages.text: NullPointerException but compiling?
negative_passages.docid: 146476
negative_passages.text: Java: Why aren't NullPointerExceptions called NullReferenceExceptions?