Browse Category: Java Core

Parallel stream and CompletableFuture example

Let’s see how we can paralellize java application. Suppose we have asked to develop application where given the libraries list we need to calculate the number of books in each library. Suppose calculation is an expensive operation. The first thing that comes to our mind is to do this by streams.

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How java 8 default method ambiguity solved

Default methods are introduced in Java 8. The main purpose of default method is to make possible evolving an existing API in compatible way. Interfaces can contain method implementation for which implementing class doesn’t need to provide implementation.

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MultiKey Map

Java Map interface doesn’t provide possibility to have multiple keys for single entry. Let’s see what are the possible workarounds.

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