I am trying to make a program that estimates pi with the Leibniz equation as an attribute to pi day, however instead of printing out the estimated pi value that I wanted the console is printing out “infinity” for infinite times until I terminate the execution. I am very very confused, help needed!…
Tag: exception
Is it possible to access instance of exception “catched” with JUnit Rule ExpectedException?
Suppose that in a test is: and some test contains: Now if there is a need to inspect this SomeNastyException more detailed what would be the way? Of course it would be possible just not to use ExcpectedException and wrap call with try/catch and then inspect the exception in any way it is needed but now questi…
How to handle UsernameNotFoundException spring security
How to handle UsernameNotFoundException ? In spring security when username not found the UserDetailsService implementation throws a UsernameNotFoundException. For example like this: I would like to build a custom “User not found REST response”. How should I catch/handle this exception? I have impl…
java.lang.ClassNotFoundException: org.glassfish.jersey.internal.RuntimeDelegateImpl , when throwing BadRequestException
I have a handler class in my springbootapp that performs some validation on incoming REST requests and throws BadRequestException back to the controller class. But instead of controller catching the BadRequestException, it catches Exception and throws java.lang.ClassNotFoundException: org.glassfish.jersey.int…
Unable to use custom HttpMessageNotReadableException error message in Spring Boot
I’m currently trying to provide custom messages for exceptions, but ran into an issue with HttpMessageNotReadableException. I have an ErrorDetails class: I also have a custom exception handler: But when i try to post a bad request, for example, with a field that should have a integer value I pass a stri…
Exceptions or null in java
I have the next doubt. According to good practices of java, how to manage the cases in which the object can not be found and we want to know why. For example, if someone has problems logging in our system and we want to inform them exactly what is the problem, we cannot return null because we lose the reason
Reading from File – Error “Exception in thread “main” java.util.NoSuchElementException: No line found”
I am writing a program that reads from a file titled “grades.txt” and displays the student’s name, three grades, and the average of those three grades. The text file looks like this: Here is the code. I am able to read from the file and output everything correctly. However, I keep getting th…
Is it possible to resume Java execution after exception?
I have a ParentClass in a JAR, but not source code. I am implementing a SubClass, but i need to handle some corner cases. Is there a way to run the //lots of code 2 part after handling the exception in the overriding method? I don’t want to duplicate code, and cannot modify the ParentClass. P.S: The Nul…
Writing unit test for @Nonnull annotated parameter
I have a method like this one: I would like to write a unit test to make sure foo() throws an NPE when value is null but I can’t since the compiler refuses to compile the unit test when static null pointer flow analysis is enabled in IDE. How do I make this test compile (in Eclipse with “Enable an…
“Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements”
Good morning Stackoverflow, I have the problem that it gives me the error: Failed to create sessionFactory object.org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: nl.scalda.pasimo.model.employeemanagement.EducationTeam.coachGroup…