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Java 8: How to convert String to Map?
I have a Map: I converted it to a String: How to convert utilMapString to Map in Java8? Who can help me with? Answer Split the string by , to get individual map entries. Then split them by = to get the key and the value. Note: As pointed out by Andreas@ in the comments, this is not a reliable
Is Java 8 stream laziness useless in practice?
I have read a lot about Java 8 streams lately, and several articles about lazy loading with Java 8 streams specifically: here and over here. I can’t seem to shake the feeling that lazy loading is COMPLETELY useless (or at best, a minor syntactic convenience offering zero performance value). Let’s …
Create Base Adapters For All Recycler View Adapters
How can i perform on click of every item selection using holder in child class extending with it. Answer
No serializer found for class org.hibernate.proxy.pojo.bytebuddy.ByteBuddyInterceptor
When i try to navigate to an endpoint i get the following error I checked all my models and all the attributes have getters and setters. So what’s the problem ? I can fix that by adding spring.jackson.serialization.fail-on-empty-beans=false but i think this is just a work around to hide the exception. E…
How to returnDTO instead of entity in Spring boot pagination?
My DTO is different from entity. How can I return a DTO instead of entity with pagination while still showing information of all pages? Controller: Service: Repository: DTO: Entity: Answer The StudentDTO class can have a constructor with a Student parameter. Then you can call map on the Page object.
Does final variables occupy memory on a per-instance basis?
I have read other question-answers regarding final instance variables and i came to knew that non-static final instance variables are created in heap for every instance of the class but in java -the complete reference by herbert schildt it is said that : Variables declared as final do not occupy memory on a p…
How to dynamically declare shape of an Array in Java?
I am working with an API where I need to provide a Object[], Object[][], Object[][][]… you get the idea. Assume setFoo requires an Object[], this is how I get it to work: And this is how I make Object[][] requirement work, so that I can call setBar.. The problem is, I am not able to figure out how to cr…
MapStruct – Can’t map property Optional to LocalDate
NOTE: This is unlike other questions on StackOverflow because they resolve this issue by mapping the two classes manually. Since ScheduleSource and ScheduleTarget are exactly the same classes, I want them to be mapped automatically. Hi, I have 2 classes ScheduleSource and ScheduleTarget. They have exactly the…
How to remove a maven lib (jsr250-api-1.0.jar) from the plugin classpath (jetty:run)?
I’m working on migrating our projects from java 8 to 11. As a first step, i’m compiling it with source and target compatibility 1.8, but trying to run the application over the openjdk-11. During development, we are using the jetty:run goal to start the application server. This goal is failing with…