query: How to solve NullPointerException when I press back Button Press
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 29731
negative_passages.text: Android: Clear the back stack
negative_passages.docid: 78586
negative_passages.text: Why doesn't "System.out.println" work in Android?
negative_passages.docid: 146955
negative_passages.text: Implementing back/forward buttons in Swing
negative_passages.docid: 87728
negative_passages.text: ArgumentNullException or NullReferenceException from extension method?
negative_passages.docid: 66284
negative_passages.text: NullPointerException when Creating an Array of objects
negative_passages.docid: 13711
negative_passages.text: java.lang.NullPointerException at org.glassfish.hk2.classmodel.reflect.impl.TypesImpl.getType
negative_passages.docid: 128316
negative_passages.text: i found Null pointer exception while executing testng in selenium
negative_passages.docid: 109768
negative_passages.text: How to exit when back button is pressed?
negative_passages.docid: 73120
negative_passages.text: Nullpointerexception when trying to send data from activity to class
negative_passages.docid: 150460
negative_passages.text: back commandbutton in jsf
negative_passages.docid: 62203
negative_passages.text: Programmatically go back to the previous fragment in the backstack
negative_passages.docid: 37988
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object:
negative_passages.docid: 42025
negative_passages.text: App crashes when tapping the back button, immediately after tapping "Favourite"
negative_passages.docid: 92797
negative_passages.text: How to debug NullPointerException in selenium-java
negative_passages.docid: 118747
negative_passages.text: Redirection sends me to the same page when I press "Back"
negative_passages.docid: 135142
negative_passages.text: How to make some code execute when the user leaves the current activity (Pressing back hardware button)