> For the complete documentation index, see [llms.txt](https://deeplearning4j.konduit.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://deeplearning4j.konduit.ai/en-1.0.0-rewrite/master.md). # Eclipse Deeplearning4j Eclipse Deeplearning4j is an open-source, distributed deep learning framework for the JVM. It provides a complete ecosystem for building, training, and deploying neural networks in Java and Scala, with native GPU acceleration via CUDA and high-performance CPU computation via OpenBLAS and oneDNN. ## Getting Started New to Deeplearning4j? Start here: * [**Ecosystem Overview**](/en-1.0.0-rewrite/core-concepts/ecosystem-overview.md) — understand how all the libraries fit together * [**Quickstart**](/en-1.0.0-rewrite/deeplearning4j/quickstart.md) — build and train your first neural network in 10 minutes * [**Maven Setup**](/en-1.0.0-rewrite/configuration/maven.md) — add DL4J to your project * [**Beginners Guide**](/en-1.0.0-rewrite/deeplearning4j/beginners.md) — learning resources and roadmap ## The Ecosystem | Library | Purpose | Start Here | | ------------------ | ---------------------------------------------- | ------------------------------------------------------------ | | **ND4J** | N-dimensional array library (NumPy for Java) | [Overview](/en-1.0.0-rewrite/nd4j/overview.md) | | **Deeplearning4j** | Neural network training and inference | [Quickstart](/en-1.0.0-rewrite/deeplearning4j/quickstart.md) | | **SameDiff** | Automatic differentiation and graph execution | [Overview](/en-1.0.0-rewrite/nd4j/overview-2.md) | | **DataVec** | Data loading, transformation, and ETL | [Overview](/en-1.0.0-rewrite/datavec/overview.md) | | **Model Import** | Import models from Keras, TensorFlow, ONNX | [Overview](/en-1.0.0-rewrite/model-import/overview.md) | | **Python4J** | Python interop from Java via CPython embedding | [Overview](/en-1.0.0-rewrite/python4j/overview.md) | | **OmniHub** | Pretrained model registry | [Overview](/en-1.0.0-rewrite/omnihub/overview.md) | | **Arbiter** | Hyperparameter optimization | [Overview](broken://pages/vyba7jIBoHmQwsE9K4r5) | ## Core Concepts Before diving into specific libraries, review the foundational concepts: * [Tensors and NDArrays](/en-1.0.0-rewrite/core-concepts/tensors-and-ndarrays.md) — the fundamental data structure * [Data Pipelines](/en-1.0.0-rewrite/core-concepts/data-pipelines.md) — loading and transforming data for training * [Neural Network Fundamentals](/en-1.0.0-rewrite/core-concepts/neural-net-fundamentals.md) — layers, activations, loss functions * [The Training Loop](/en-1.0.0-rewrite/core-concepts/training-loop.md) — how training works end-to-end * [Evaluation](/en-1.0.0-rewrite/core-concepts/evaluation.md) — measuring model performance * [Memory and Workspaces](/en-1.0.0-rewrite/core-concepts/memory-and-workspaces.md) — off-heap memory management ## Quick Links | Task | Page | | ------------------------------------ | ------------------------------------------------------------------------------------------- | | Configure Maven/Gradle dependencies | [Maven Setup](/en-1.0.0-rewrite/configuration/maven.md) | | Set up GPU acceleration | [GPU and CPU Setup](/en-1.0.0-rewrite/configuration/gpu-cpu.md) | | Train a CNN for image classification | [Convolutional Layers](/en-1.0.0-rewrite/deeplearning4j/multilayernetwork/convolutional.md) | | Train an RNN/LSTM for sequences | [Recurrent Layers](/en-1.0.0-rewrite/deeplearning4j/multilayernetwork/recurrent.md) | | Import a Keras model | [Keras Import](/en-1.0.0-rewrite/model-import/overview-1.md) | | Import a TensorFlow model | [TensorFlow Import](/en-1.0.0-rewrite/model-import/overview-2/tensorflow.md) | | Import an ONNX model | [ONNX Import](/en-1.0.0-rewrite/model-import/overview-2/onnx.md) | | Run distributed training on Spark | [Spark How-To](/en-1.0.0-rewrite/deeplearning4j/overview-1/spark-howto.md) | | Use pretrained models | [Model Zoo](/en-1.0.0-rewrite/deeplearning4j/overview-2.md) | | Debug memory issues | [Memory Configuration](/en-1.0.0-rewrite/configuration/memory.md) | | Call Python from Java | [Python4J](/en-1.0.0-rewrite/python4j/overview.md) | ## Versions This documentation covers **Deeplearning4j 1.0.0-M2.1** (current). Use the version selector in the sidebar or the links below to access documentation for other releases. | Version | Status | Docs | | -------------- | ----------- | ---------------------------------------------------------------- | | **1.0.0-M2.1** | **Current** | You are here | | 1.0.0-M1.1 | Previous | [View docs](https://deeplearning4j.konduit.ai/v/en-1.0.0-m1.1/) | | 1.0.0-M1 | Previous | [View docs](https://deeplearning4j.konduit.ai/v/en-1.0.0-m1/) | | 1.0.0-beta7 | Legacy | [View docs](https://deeplearning4j.konduit.ai/v/en-1.0.0-beta7/) | | 1.0.0-beta6 | Legacy | [View docs](https://deeplearning4j.konduit.ai/v/en-1.0.0-beta6/) | --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. 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