Collections
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Core Java
Consuming java.util.concurrent.BlockingQueue as rx.Observable
Classical producer-consumer pattern is relatively simple in Java since we have java.util.concurrent.BlockingQueue. To avoid busy waiting and error-prone manual locking…
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Core Java
Transforming Collections
Did you ever want to substitute the equals and hashCode methods a HashSet or HashMap uses? Or have a List…
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Core Java
Simple benchmarking : Immutable Collections VS Persistent Collections
Often you need to add new elements to a collection. Because you are a good and careful developer you want…
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Core Java
How to Use Java 8 Streams to Swiftly Replace Elements in a List
Imagine you have a list of items: List<String> books = Arrays.asList( "The Holy Cow: The Bovine Testament", "True Hip Hop",…
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Core Java
Transforming Collections with Decorators
The Decorator Pattern Ever since first learning the programming design patterns, the decorator pattern has been my favorite. It seemed…
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Core Java
Stream-Powered Collections Functionality in JDK 8
This post presents application of JDK 8 – introduced Streams with Collections to more concisely accomplish commonly desired Collections-related functionality.…
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Core Java
How to use CopyOnWriteArraySet in Java with Example
CopyOnWriteArraySet is little brother of CopyOnWriteArrayList class. These are special purpose collection classes which was added on JDK 1.5, along…
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Core Java
Code4ReferenceList Recently Used(LRU) implementation using LinkedHashMap
Recently I stumbled on one of the Java interview questions: “Implement List-Recently-Used (LRU) Cache using Java collection class?” If you…
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Core Java
HashMap performance improvements in Java 8
HashMap<K, V> is fast, versatile and ubiquitous data structure in every Java program. First some basics. As you probably know,…
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