Encoding string attributes with UTF-8 and java

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Hi,

I try to set the character set for my attributes in java to UTF-8. The
encoding in ASCII seems correct with :
H5.H5Tset_cset(tid, HDF5Constants.H5T_CSET_ASCII);
For the UTF-8, unfortunately the constant HDF5Constants.H5T_CSET_UTF8 is
not defined.

http://www.hdfgroup.org/hdf-java-html/javadocs/ncsa/hdf/hdf5lib/HDF5Constants.html#H5T_CSET_ASCII

The UTF-8 Unicode encoding is available in the C API :

http://www.hdfgroup.org/HDF5/doc/RM/H5T/H5Tset_cset.htm

Is there a way to create a string attribute with UTF-8 encoding in
java ?

Thank you
Guillaume