nullpointerexception – One day all of my programs on processing written in java stoped working. How to solve these errors?

I am trying to run programs on processing I coded. They used to work fine, but one day they all stopped working and started showing the same error messages. the code below is one example. int cellSize = 10; float p0 = 50; float p1 = 25; float p2 = 0; float p3 = 0; … Read more

java – What is a NullPointerException, and how do I fix it?

Question: What causes a NullPointerException (NPE)? As you should know, Java types are divided into primitive types (boolean, intetc.) and reference types. Reference types in Java allow you to use the special value null which is the Java way of saying “no object”. A NullPointerException is thrown at runtime whenever your program attempts to use … Read more

java – NullPointerException error on an Android-GeoFire project

This is the error I’m getting: java.lang. Attempt to call the virtual method ‘double android.location.Location.getLatitude()’ on a null object reference results in a NullPointerException.Can anyone guide me on how to achieve this? public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks , GoogleApiClient.OnConnectionFailedListener, LocationListener { private GoogleMap mMap; private ActivityMapsBinding binding; private static final int MY_PERMISSION_REQUEST_CODE … Read more