Could someone check my code for why I'm getting NullPointerExceptions in various methods? I've been racking my brain and can't figure out what is wrong. I'm att
What are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them? What methods/tools can be used to determine the cause
I've this basic app called Navigation that I was trying to make to understand some concepts where there are 2 activities MainActivity and ActivityB MainActivity
I try to send values of my data from one fragment which is contains Instruments to HolderList which is contain Holder data for comparing values in ArrayList of
List<User> sortedList = userList.stream() .sorted(Comparator.comparingInt(User::getAge).reversed()) .collect(Collectors.toList()); sortedL
I have a class only to store variables as keys like: public class V { public static final String SHOW_OR_FOUND = "show_or_found"; public static final in
Currently I have many spring boot services annotated with @Service. Every service works fine and there are no problems. There is a problem only with LogsService
I'm trying to get the values from an excel sheet of 2 rows, the 1st row are the headings and the second row is the data, when I execute the code the 1st set of
When I use 'try(){} catch' to deal with autoclosable object, findbugs report a bug that I don't check nullale for the instance populate in the '()' segment. So
public List<Order> getAllOrdersByCustomerId(int customerId) throws SQLException { List<Order> AllOrdersByCustomerId = new Arra
I am developing an app that controls arduino with bluetooth , everything was working fine with the app , I am able to connect with the arduino bluetooth bridge
I want to add an ImageIcon to the Panel, but I got this Exception ( java.lang.NullPointerException: Cannot invoke "java.net.URL.toExternalForm()" because "locat
I am receiving a null pointer exception when trying to launch an instance of excel to export data to. I have tried adding the newest version of COM4J.jar to my
I got the following error while running a simple helloworld sample drools project. 199 [main] ERROR org.drools.compiler.kie.builder.impl.KieContainerImpl - Unk
I want use @Nullable annotation to eliminate NullPointerExceptions. I found some tutorials on the net, I noticed that this annotation comes from the package j
I have an app with 100 installs done but I have 2 error on java.lang.NullPointerException; the thing is that when that error came in my device or emulator I cou
According to this video https://www.youtube.com/watch?v=n_Y7r-7GxDo I need to place the icons in the main package. Even after this, I get the same error packa
According to this video https://www.youtube.com/watch?v=n_Y7r-7GxDo I need to place the icons in the main package. Even after this, I get the same error packa