As a collection of class definitions and implements, Java libraries enable developers to speed up custom software development by reusing the code written by others. The developers have option to choose from a variety of Java libraries according to their precise needs. Some of these Java libraries are mature, whereas others are relatively new. Also, the functionality, usability, and quality of individual Java libraries differ. Most Java programmers opt for popular and widely used Java libraries. The smart developers even evaluate the Java libraries based on the number of stars on

Top 10 Java Libraries on Github according to Number of Stars

1) RxJava

The popular library is a Java virtual machine (VM) implementation of Reactive extensions. The developers can use RxJava to compose asynchronous and event-based programs with observable sequences. They can use the library to sequence data or events and compose sequences declaratively by extending the observer pattern.

2) Guava

Google has developed Guava as a set of core libraries for Java programming language. The developers have option to choose from two distinct flavours of Guava according to their precise needs. They can even use the latest version of Guava to avail a graph library, an in-memory cache, functional types, immutable collections, I/O, string processing, and APIs/utilities for currencies.

3) LeakCanary

It is one of the most popular memory leak detection library for Java programming language and Android mobile OS. LeakCanary is developed with capability to detect activity memory leak in the debug build. It further conveys information about the activity memory leaks by sending on-time notifications to developers. The developers can even customize LeakCanary according to their precise needs.

4) ZXing

Zebra Crossing (ZXing) is a popular barcode scanning library for Java programming language and Android mobile platform. The library implemented in Java has the capability to process a variety of barcode images – 1D and 2D. Also, it supports barcode images in multiple formats – 1D product, 1D industrial and 2D. The developers even have option to avail a number of components provided by ZXing – core, javase, android and android-core – according to their precise needs.

5) Gson

Google has developed Gson as a serialization and deserialization library. The Java programmers can use Gson to convert Java objects into JSON. Also, they can use the library to convert JSON strings into Java objects. Unlike other serialization and deserialization libraries, Gson enables developers to convert Java objects into JSON regardless of access to their source code.

6) MaterialDrawer

It is one of the widely used drawer libraries for Android. MaterialDrawer makes it easier for Java programmers to implement navigation drawer in an easy, fast, and flexible way according to latest Android Design Guidelines. At the same time, it provides a number of useful functionalities including a quick and simple API, quick and easy integration, customizable themes, default drawer items, extendable items and badge support.

7) MaterialViewPager

As its name indicates, MaterialViewPager is a material view pager library for Android. The developers can connect the library to the layout of their activity without writing additional code. Also, they can use MaterialViewPager to create appealing screen, and preview the screens on Android Studio. They even have option to use the library as a regular Android View, and customize it according to their precise needs.

8) Dropwizard

The Java developers can use Dropwizard to create production-ready web services without putting extra time and effort. The library is also developed as a glue code for a set of independent libraries – Jetty, Jersey, Jackson, Logback, Metrics, Liquibase and JDBI. The developers can use Dropwizard to accelerate web services and Java application development by integrating the independent libraries seamlessly.

9) UCrop

The hugely popular image cropping library comes with features to provide a flexible image cropping experience to Android app developers. UCrop is also designed specifically to overcome shortcomings of several widely used image cropping libraries for Android. Unlike similar libraries, uCrop enables developers to rotate images, scale images, change crop aspect ratio, and supports touch gestures. It further accelerates image scaling and rotation by supporting functional design and providing neat widgets.

10) Rebound

Facebook has developed this Java library to model spring dynamics. The developers can use Rebound to create a variety of animations. They can even make the animations feel natural by embedding real world physics into the app. However, they cannot use Rebound as a general purpose physics library. The library can be used for driving animations through spring dynamics. The animation created with Rebound can also be used as building blocks for robust components like pagers and scrollers.

However, no experienced Java application developer picks a Java library based on its popularity of Github. He evaluates the pros and cons of each Java library according to precise needs of the project. In addition to checking the number of stars, he also checks if the Java library is recently updated or not.