Browse free open source Java Libraries and projects below. Use the toggles on the left to filter open source Java Libraries by OS, license, language, programming language, and project status.

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  • 1
    libjpeg-turbo

    libjpeg-turbo

    SIMD-accelerated libjpeg-compatible JPEG codec library

    libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86-64, ARM, and PowerPC systems. On such systems, libjpeg-turbo is generally 2-6x as fast as libjpeg, all else being equal. On other types of systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by virtue of its highly-optimized Huffman coding routines. In many cases, the performance of libjpeg-turbo rivals that of proprietary high-speed JPEG codecs. libjpeg-turbo implements both the traditional libjpeg API as well as the less powerful but more straightforward TurboJPEG API. libjpeg-turbo also features colorspace extensions that allow it to compress from/decompress to 32-bit and big-endian pixel buffers (RGBX, XBGR, etc.), as well as a full-featured Java interface.
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    Downloads: 43,848 This Week
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  • 2
    JFreeChart
    JFreeChart is a free (LGPL) chart library for the Java(tm) platform. It supports bar charts, pie charts, line charts, time series charts, scatter plots, histograms, simple Gantt charts, Pareto charts, bubble plots, dials, thermometers and more. *** JFreeChart has moved to GitHub: https://github.com/jfree/jfreechart ***
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    Downloads: 407 This Week
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  • 3
    ZXing

    ZXing

    Barcode scanning library for Java, Android

    ZXing or “Zebra Crossing” is an open source multi-format 1D/2D barcode image processing library that’s been implemented in Java, and also comes with ports to other languages. It currently supports the following formats: UPC-A and UPC-E EAN-8 and EAN-13 Code 39 Code 93 Code 128 ITF Codabar RSS-14 (all variants) RSS Expanded (most variants) QR Code Data Matrix Aztec ('beta' quality) PDF 417 ('alpha' quality) MaxiCode ZXing is made up of several modules, including a core image decoding library, JavaSE-specific client code, and Android client Barcode Scanner. It is the basis of many other third-party open source projects.
    Downloads: 74 This Week
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  • 4
    A Java JNA wrapper for Tesseract OCR API
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    Downloads: 78 This Week
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  • 5
    uCrop

    uCrop

    Image cropping library for Android

    We develop lots of different Android apps at Yalantis, and our experience shows that almost every application we deal with needs image cropping functionality. Image cropping can be used for various purposes, from ordinary adjustment of user profile images to more complex features that involve aspect ratio cropping and flexible image transformations. Since we want to provide all our customers with the best set of tools for image editing functionality, we decided to create uCrop, an image cropping library for Android. You might be wondering why we couldn’t just use one of the existing solutions for image cropping for Android. After all, you can find lots of them on Github and on the Android Arsenal. But here is the thing, none of these solutions could satisfy our requirements. Let’s take a quick look at the most popular open-source image cropping libraries and explain why they don’t quite fit the bill.
    Downloads: 10 This Week
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  • 6
    Importer library to import assets from different common 3D file formats such as Collada, Blend, Obj, X, 3DS, LWO, MD5, MD2, MD3, MDL, MS3D and a lot of other formats. The data is stored in an own in-memory data-format, which can be easily processed. www.open3mod.com/ is a 3D model viewer and exporter based on Assimp that is also Open Source.
    Downloads: 32 This Week
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  • 7
    Fresco

    Fresco

    An Android library for managing images and the memory they use

    Fresco’s image pipeline will load images from the network, local storage, or local resources. To save data and CPU, it has three levels of cache; two in memory and another in internal storage. Fresco’s Drawee shows a placeholder for you until the image has loaded and then automatically shows the image when it arrives. When the image goes off-screen, it automatically releases its memory. A decompressed image - an Android Bitmap - takes up a lot of memory. This leads to more frequent runs of the Java garbage collector. This slows apps down. The problem is especially bad without the improvements to the garbage collector made in Android 5.0. On Android 4.x and lower, Fresco puts images in a special region of Android memory. It also makes sure that images are automatically released from memory when they’re no longer shown on screen. This lets your application run faster - and suffer fewer crashes.
    Downloads: 7 This Week
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  • 8
    MPAndroidChart

    MPAndroidChart

    A powerful Android chart view / graph view library

    MPAndroidChart is a powerful chart library for Android that offers a beautiful and comprehensive range of charts and graphs. Powerful and very easy to use, it supports the creation of bar-, line-, pie-, bubble-, scatter-, radar- and candlestick charts, as well as scaling, dragging and animations. Charts are rendered cleanly and are visually engaging. Visualizing your data exactly how you want is so much easier with MPAndroidChart. To see more great examples of MPAndroidChart, download the MPAndroidChart Example App on Google Play.
    Downloads: 4 This Week
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  • 9
    JChart2D

    JChart2D

    jchart2d is a real-time charting library written in java.

    JChart2D is a easy to use component for displaying two- dimensional traces in a coordinate system written in Java. It supports real-time (animated) charting, custom trace rendering, Multithreading, viewports, automatic scaling and labels. Former UI controls (right click context menu, file menu) have been ported to the subproject jchart2d-uimenu (https://sourceforge.net/projects/jchart2d-uimenu.jchart2d.p/) for the benefit of having no dependencies to 3rd party libraries.
    Downloads: 6 This Week
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  • 10
    Picasso

    Picasso

    A powerful image downloading and caching library for Android

    Images add much-needed context and visual flair to Android applications. Picasso allows for hassle-free image loading in your application—often in one line of code! Many common pitfalls of image loading on Android are handled automatically by Picasso: Handling ImageView recycling and download cancelation in an adapter. Complex image transformations with minimal memory use. Automatic memory and disk caching. Adapter re-use is automatically detected and the previous download canceled. Transform images to better fit into layouts and to reduce memory size. You can also specify custom transformations for more advanced effects. Picasso supports both download and error placeholders as optional features. Resources, assets, files, content providers are all supported as image sources. For development you can enable the display of a colored ribbon which indicates the image source.
    Downloads: 1 This Week
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  • 11
    Subsampling Scale Image View

    Subsampling Scale Image View

    Deep zoom view for displaying huge images without loss of detail

    Android library (AAR). Highly configurable, easily extendable deep zoom view for displaying huge images without loss of detail. Perfect for photo galleries, maps, building plans etc. A custom image view for Android, designed for photo galleries and displaying huge images (e.g. maps and building plans) without OutOfMemoryErrors. Includes pinch to zoom, panning, rotation and animation support, and allows easy extension so you can add your own overlays and touch event detection. The view optionally uses subsampling and tiles to support very large images - a low resolution base layer is loaded and as you zoom in, it is overlaid with smaller high resolution tiles for the visible area. This avoids holding too much data in memory. It's ideal for displaying large images while allowing you to zoom in to the high resolution details. You can disable tiling for smaller images and when displaying a bitmap object.
    Downloads: 1 This Week
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  • 12
    Early Access iText, a PDF generation library in Java
    Downloads: 11 This Week
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  • 13
    JSpeech

    JSpeech

    Java library designed to integrate Speech-to-Text

    jSpeech is a Java library designed to integrate Speech-to-Text (STT) capabilities, command control, and diarization (speaker identification) into applications in a simple, modular, and decoupled way.
    Downloads: 7 This Week
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  • 14
    An open source Java implementation to interpret and render Computer Graphics Metafile (CGM) graphics files.
    Downloads: 7 This Week
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  • 15
    The JAVE (Java Audio Video Encoder) library is Java wrapper on the ffmpeg project. Developers can take take advantage of JAVE to transcode audio and video files from a format to another (
    Downloads: 4 This Week
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  • 16
    UJAC is a collection of Java components that may be useful for your project. It provides a powerful expression interpreter, a iText based document processing engine that generates PDF documents based on XML templates, a charting library and much more.
    Downloads: 6 This Week
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  • 17
    threeddonut

    threeddonut

    3D donut. Example of frojasg1.com libraries usage

    The application shows a 3D donut, that can be rotated with two sliders in both axis. It is a simple example of what can be done with frojasg1.com platform libraries: - Zoom option for components - Multi language - Dark mode option - Automatic Undo-Redo for text components, with popup menu included - Text Search/Replace window prepared to be used. - Base components for auto-completion windows. - Automatic component relocation after redimensioning a window. - Base classes for formating text on the fly in JTextPanes - Improved JFileChooser and other functions: - Basic functions of all kind. - Accurate image resizing. - Function to process images. - Classes to easy the xml file management (without validation) - JDK-17 compatibility You will find more about it at this web site: https://www.frojasg1.com:8443/downloads_web/web/html/donut.html?origin=sourceforge
    Downloads: 5 This Week
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  • 18
    JACo MP3 Player ( java mp3 player )
    JACo MP3 Player is a cross platform java mp3 player. Features: very low CPU usage (~2%), incredible small library (~90KB), doesn't need JMF, easy to integrate in any application, easy to integrate in any web page (as applet).
    Downloads: 6 This Week
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  • 19
    JAAD
    JAAD is an open-source AAC decoder and MP4 demultiplexer library written completely in Java. It is platform-independent and portable.
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    Downloads: 1 This Week
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  • 20
    A Java library for creation and editing of several playlist formats.
    Downloads: 3 This Week
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  • 21
    Hide & Reveal
    Composed of a Java steganographic library and GUI to use steganography. Primarily intended for research communities on security and steganography to implement new dissimulation and steganalysis algorithms. More information at www.hidereveal.org
    Downloads: 1 This Week
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  • 22
    The Cisco IP Phone Idle Display Logo Engine project or CIP IDLE A framework for displaying custom logos on Cisco IP Phones 79XX series. Also provides a Java alternative to cip2gif.exe and gif2cip.exe
    Downloads: 1 This Week
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  • 23

    jAudioTaggerLib

    Repackage of jAudioTagger for developers

    Repackaged what was needed to use jAudioTagger as a library in Java. Made it usable as a netbeans project. Added targets in the build.xml to produce sources jar and javadocs jar for the library jar that is produced. Also uploaded are those jars (that I couldn't find anywhere else).
    Downloads: 1 This Week
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  • 24
    3DzzD is an API to publish 3D on the Web using Java 1.1 technologie.
    Downloads: 0 This Week
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  • 25
    AVLoadingIndicatorView

    AVLoadingIndicatorView

    A collection of nice loading animations for Android

    AVLoadingIndicatorView is a collection of nice loading animations for Android. You can add dependencies in build.gradle. You have the option of adding the AVLoadingIndicatorView to your layout. Indicators are load from class names, proguard may change it (rename). Among the features provided and available, you can add dependencies, add xml layout, show and hide, etc. AVLoadingIndicatorView is very simple to use. You can also find iOS version of AVLoadingIndicatorView under the name "NVActivityIndicatorView". You can change all properties in Attributes inspector tab of Utilities panel. All properties are public so you can change them after initializing.
    Downloads: 0 This Week
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