Learn ways of Collecting a Stream of List into Map using Java Streams API. Using Collectors.toMap and Collectors.groupingBy with example.
Java Core Tutorials
Java Core defines the basics of Java Programming language and language fundaments
Java Persistence API Guide
This guide covers an overview of Java Persistence API (JPA). Why it was created, what are the highlights, and what are the major parts. Learn Entity, EntityManager, JPQL and Criteria.
Understanding Java 8 Streams API
This article helps Understanding Java 8 Streams API. Learn what are streams, how different they are from Collections, stream operations, behaviours with simple examples
JSR 310 Part 3 : Java 8 Date and Time API
Java 8 Date and Time API is modified. Learn about what has changed and how better it is compared to old API or Joda Time API. Explained in detailed with examples.
JSR 310 Part 2 : Joda Time API
Before we learn Java 8 Date and Time API, let’s have a looks at what is Joda Time API and how it is different than old date and time API. This will help us understand how better Java Date and Time API is.
JSR 310 Part 1 : Existing Date and Time API
Before diving deeper into Java 8 Date and Time API, let’s first understand existing Date and Time API. See the main features and examples of Date and Time API.