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List vs. ArrayList in Java

When using collections in Java it’s conventional to use the interface types for our variables and fields, rather than the concrete types. We look at the difference between these two approaches.

Set List of Objects in Swagger API Response

Learn how to modify the Swagger API response to deliver a list of objects.

List All the Classes Loaded in the JVM

Learn different techniques to list all classes loaded in the JVM

Collecting Stream Elements into a List in Java

Learn how to collect Stream elements into a List in different versions of Java, and the pros and cons of the approaches.

Display Custom Items in JavaFX ListView

Explore a way to show custom items in JavaFX ListView.

Guava’s Futures and ListenableFuture

Learn about Guava’s support in async programming: Futures and ListenableFuture

How to Convert Mono<List<T>> Into Flux<T>

Learn to convert a Mono of a collection to Flux of the collection’s items.

Get List of JSON Objects with WebClient

Learn how to convert a JSON Array into a Java Array of Object, Array of POJO, and a List of POJO using Spring WebClient

Get list of JSON objects with Spring RestTemplate

Spring RestTemplate can convert a JSON array to a variety of Java types. We look at the options and how to produce a type-specific list.

ArrayList vs. LinkedList vs. HashMap in Java

Learn about the differences between three of the most common Java Collections: ArrayList, LinkedList, and HashMap

The Capacity of an ArrayList vs the Size of an Array in Java

The capacity of an ArrayList functions differently to the size of an Array. We explore the differences and when it’s a good idea to set an ArrayList’s size.