private void jButtonStiahniActionPerformed(java.awt.event.ActionEvent evt) { //start the Rengine (JRI)
This question already has answers here: NullPointerException when Creating an Array of objects [duplicate]
I\'m trying to locate the source of the error in this trace: org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver logException: Handler execution resulted in exception
Every so often when programmers are complaining about null errors/exceptions someone asks what we do without null.
My code is throwing a NullPointerException, even though the object seems to properly exist. public class IrregularPolygon {
I often do this when necessary to prevent a null pointer exception: // Example #1 if (cats != null && cats.Count > 0)
My Android app is experiencing this crash randomly during operation, and I think it is due to a pending MotionEvent that is dispatched to a null object, but not sure.
I would like to use JPA2 Criteria API with metamodel objects, which seems to be pretty easy: ... Root<JPAAlbum> albm = cq.from(JPAAlbum.class);
Consider this class: public class TestMap extends HashMap<String, Float> { public static void main(String[] args) {
I have an app that obtains a list of available Calendars and displays them in the Spinner. I have checks to ensure that if the available Calendar list is empty,
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