I have this type of ArrayList Created New Arraylist like this I add View in the Arraylist like this and the View is Stored like this can I show the mViews list on any imageView Answer I don’t really understood your question but I hope it would help:
Tag: java
Criteria for default garbage collector Hotspot JVM 11/17
I found a source describing that the default gc used changes depending on the available resources. It seems that the jvm uses either g1gc or serial gc dependnig on hardware and os. The serial collector is selected by default on certain hardware and operating system configurations Can someone point out a more …
Convert Java object to json string containing a json string property already
Consider a Java object like following: so when we do, I was expecting something like: instead I got it as a json value wrapped into a double quotes and skipped by backslashes as it was double jsonized – if this is actually a verb – Answer I managed to overcome this problem by using @JsonRawValue F…
Object is more then 1 child, now what?
I have an abstract class called Person. A person has multiple child classes e.g. Driver, Sorter, Manager. Each of which has its unique methods, and the ones shared e.g. name/age/location, etc and so I then thought that an abstract parent-class would be the solution. (Person) Yet now I face a new problem, What…
JPA SpringBoot – Unable to Save New Entity to Database
I am attempting to add (save) a “User” to my SQL database through my Spring application (The @GetMapping requests currently work). I recently added the two annotations @CreationTimeStamp and @UpdateTimeStamp in my entity class…the version without those two annotations would produce the same …
Convert nested map fields to snake case
how to convert all the nested fields of the following object rendered as json to snake_case? Given it’s read as a org.bson.Document, jackson object mapper won’t work as it’s designed for POJOs and it’s not possible to have POJOs here as the records are schema-less Answer It can be easi…
Mockito:: Unit test case for JsonProcessingException when passing object
I have a class as shown below: Now I am trying to write a unit test case for this where I can throw exception and unit test the catch clause using Mockito but I am not able to mock it. I have noticed that object mapper class internally converting everything to string even if I set name and age to
What is a good way to handle an Optional object returned by a Spring Data JPA repository in a situation like this?
I am working on a Spring Boot application. Into a service class I have this service method: As usual it is calling the Spring Data JPA findById() method returning an Optional object. I am returning the User object. And here I have the following doubt: if the Optional is empty, it is throwing an exception when…
NoSuchMethodException in JDBI while using it with Lombok
I has immutable class like: JDBI Developer Guide states that it should work with @Value annotations. At least with bindBean() or @BindBean. But when I use org.jdbi.v3.core.result.ResultBearing#mapToBean method with MyEntry.class it throws java.lang.NoSuchMethodException: no such constructor: my.company.MyEntr…
openapi-generator-maven-plugin upgrade openapi spec to 3.1.0
I am using plugin openapi-generator-maven-plugin in version 5.3.1. Upgrading openapi spec from 3.0.3 to 3.1.0 causes generation phase errors: Spec sample: plugin error: Previous version of openapi works fine.. I couldn’t find information if plugin supports that version of spec, but error message is very…