jHDF - Pure Java HDF5 library

This is a hobby project for me to see if I can write a loader for HDF5 files. The file format specification is available from the HDF Group here. More information on the format is available on Wikipedia.

The intension is to make a clean Java API to access HDF5 data. Currently the project is targeting HDF5 1.8 read-only compatibility. For progress see the change log.

Here is an example of reading a dataset with jHDF (see ReadDataset.java)

File file = new File("/path/to/file.hdf5");
try (HdfFile hdfFile = new HdfFile(file)) {
	Dataset dataset = hdfFile.getDatasetByPath("/path/to/dataset");
	// data will be a Java array with the dimensions of the HDF5 dataset
	Object data = dataset.getData();
}

For an example of traversing the tree inside a HDF5 file see PrintTree.java

Developing jHDF

• Clone this repository.
• Inside the jhdf directory run ./gradlew build (./gradlew.bat build on Windows) this will run the build and tests fetching dependencies.
• Import the Gradle project jhdf into your IDE
• Add tests and make changes
• Once you have made any changes please open a pull request.

To see other available Gradle tasks run ./gradlew tasks