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Guide to Guava’s Ordering 1. Overview In this article, we will look at Ordering class from the Guava library. The Ordering class implements the Comparator interface and gives us a useful fluent API for creating and chaining comparators. As a quick sidenote, it’s also worth looking at the new Comparator.comparing()… Continue Reading guava-ordering

Guide to Guava’s Reflection Utilities 1. Overview In this article, we’ll be looking at the Guava reflection API – which is definitely more versatile compared to the standard Java reflection API. We’ll be using Guava to capture generic types at runtime, and we’ll making good use of Invokable as well.… Continue Reading guava-reflection

Guide to Guava ClassToInstanceMap 1. Overview A ClassToInstanceMap<B> is a special kind of map that associates classes with corresponding instances. It makes sure that all the keys and the values are subtypes of the upper bound type B. ClassToInstanceMap extends Java’s Map interface and provides two additional methods: T getInstance(Class<T>)… Continue Reading guava-class-to-instance-map

Guava Set + Function = Map 1. Overview In this tutorial – we will illustrate one of many useful features in Guava‘s collect package: how to apply a Function to a Guava Set and obtain a Map. We’ll discuss two approaches – creating an immutable map and a live map… Continue Reading guava-set-function-map-tutorial

Introduction to Guava Memoizer 1. Overview In this tutorial, we’ll explore the memoization features of Googles’ Guava library. Memoization is a technique that avoids repeated execution of a computationally expensive function by caching the result of the first execution of the function. 1.1. Memoization vs. Caching Memoization is similar to… Continue Reading guava-memoizer

Guava – Write to File, Read from File 1. Overview In this tutorial – we will learn how to write to a file and then how to read from a file using Guava IO. We will discuss how to write to file. 2. Write Using Files Let’s start with a… Continue Reading guava-write-to-file-read-from-file

Guide to the Guava BiMap 1. Overview In this tutorial, we’ll show how to use the Google Guava’s BiMap interface and its multiple implementations. A BiMap (or “bidirectional map”) is a special kind of a map which maintains an inverse view of the map while ensuring that no duplicate values… Continue Reading guava-bimap

Guide to Guava RangeMap 1. Overview In this tutorial, we’ll show how to use the Google Guava’s RangeMap interface and its implementations. A RangeMap is a special kind of mapping from disjoint non-empty ranges to non-null values. Using queries, we may look up the value for any particular range in… Continue Reading guava-rangemap