How can I accept an argument list in a constructor and add it to a collection in Java?

I’m trying to make a constructor that would accept any number of variables of class “Item” as a variable argument list and add them to appropriate collection. What would be the best way to …

Combine two lists by ID

I have two lists of objects with contents that look like this: List A id = 1, name = “alex”, height = null, weight = 60 id = 2, name = “sara”, height = null, weight = 50 List B id …

Javers – comparison String, Collection and Boolean with defined rules

I have 2 classes: @Data @Builder public class Boss { private String name; private List subordinates; } @Data @Builder public class Employee { private String …

How to Avoid nested for Loops in java to get the heirarchical data?

// This method will return the list of reference names, in this method I wrote the code using nested //for-loops this handle only 3 subfolders set what if there is one more subfolder and how to handle …

ConcurrentModificationException when iterate through ImmutableMap.copyof()

Currently, I have a problem when I frequently iterating through a HashMap (1-time per second) I add new element to the map on the main thread and iterate the map on the other thread I return an …

Trying to sort a Double Collection

I am trying to sort a Collection. I cant seem to get my code to work with what I have found online. Collection: [104.131119, 104.188937, 93.174548, 100.533096, 97.902247, 98.608619, 93.380054, 106….

Best way to sort customerAddress in such a way that all primary address are at the top and others at the bottom

I am trying to sort the below list in such a way that primary address is at the top of the list followed by other address (p.getIsPrimary is a Boolean value and can be null). Is there any other way …

Unable to decide Java collection

My usecase is like in which I need to maintain a collection of unique items. I may need to frequently add or remove items from the collection at an index(which I have as member of the item currently, …

Spring SPEL collection projection

A simple question on SPEL collection selection. Look at section 10.5.17 Collection Selection on this page https://docs.spring.io/spring/docs/4.3.10.RELEASE/spring-framework-reference/html/expressions….

Java 8 Remove 1 List from Other

I have two list of different Objects. class School { private String schoolName; private String location; private String pinCode; private String rating; } class World { private …