I would like to learn how to write a SpringBootTest for an existing ApplicationConfiguration class for the purpose of testing the functionality of reading the application.yml file. I would be happy with java or groovy. I am not able to share the existing ApplicationConfiguration class, so I would gladly accep…
Tag: java
The method countTrue(boolean[]) in the type GUI is not applicable for the arguments (boolean, boolean, boolean, boolean, boolean)
this is the error : “The method countTrue(boolean[]) in the type GUI is not applicable for the arguments (boolean, boolean, boolean, boolean, boolean)” , the error is in the last line , but i dont get why. Answer New array should be declared as below: int x = GUI.countTrue(new boolean[]{true, fals…
Spring with Jackson set JsonAutoDetect globally
In my spring boot web application, I want to serialize many different classes to JSON when I return them from the function of a request mapping. These classes only contain private fields without getters. In order for Jackson to serialize these private fields I can annotate all those classes with the following…
Query DynamoDb Global Secondary Index
i am trying out dynamodb locally and got the following table: I want to query it with Java like this: But it throws a Exception with “QUery Key Condition not supported”. I dont understand this, because in the docs, the “<” operator is described as regular operation. Can anybody help…
return throw exception in Kotlin
I have the following problem, I can’t return this exception. It’s giving an error 500 and doesn’t run this exception. I wish that when I entered the if it would already return this custom exception. KOTLIN JAVA Answer You need to use RestControllerAdvice or ControllerAdvice like
How to iterate from a given key in Java TreeMap
I have a TreeMap, and want to get a set of K smallest keys (entries) larger than a given value. I know we can use higherKey(givenValue) get the one key, but then how should I iterate from there? One possible way is to get a tailMap from the smallest key larger than the given value, but that’s an overkil…
Problem with Foreign Key in @OneToOne annotation
I have spent a couple of days with a weird problem. There is a plethora of similar posts here in StackOverflow and I have check a lot of them but I was unable to find something similar with this. I have a Human Parent class A User child class : and also a CollectionOfContactMethods with composition relationsh…
Java spring userRegister creates two database entries instead of one
As above this creates two database entries in user table. The process should be following: a new user enters their email and password -> saved in login table user confirm Email address -> entry in user table with username (email) and first&second name should be null at first. For second the code wou…
Get “error in opening zip file” on new Smooks()
I get an error when I try to generate a new Smooks instance: the smooks-config.xml: Why? What I do wrong? I use Smooks-2.0.0-M3 Here is the Stacktrace: But I don’t use a Zip-File on any Parts. I use smooks in a Apache Camel processor, but I don’t think that this have any impact. Answer Smooks is a…
How to get an average int for a Collection of an Entity using thymeleaf?
I have an Employee Entity that has a Collection of Reviews, each Review has a byte grade. Unnecessary details are omitted for brevity How can I get an average Review grade for each Employee using Thymeleaf to insert in Table? Answer Thymeleaf has aggregate functions. You can combine them with collection proje…