CODEWITHSUNDEEP
javapythonnumpy
Mario
Mario

Reputation: 493

Passing numpy arrays to Java using Jpype

I am trying to convert a numpy array into a Java-like array using JPype's JArray command. 

values = valBD.ReadAsArray()
JArray(float, values.ndim)(values)

leads to the following error message:

JArray(float, values.ndim)(values) File "c:\Python26\lib\site-packages\jpype_jarray.py", line 125, in JArray elif issubclass(t, _jclass._JAVAOBJECT):

TypeError: issubclass() arg 2 must be a class or tuple of classes

Do you habe any suggesions? Thanks a lot, Martwig

Upvotes: 3

Views: 1963

Answers (2)

asfafsasdasd
asfafsasdasd

Reputation: 21

The other answer doesn't work. Try this:

a = JArray(JFloat,1)([1.5,2.0])

Upvotes: 2

Nick ODell
Nick ODell

Reputation: 25454

JPype is expecting a list or list of lists, not a numpy array.

Try this:

values = valBD.ReadAsArray()
JArray(float, values.ndim)(values.tolist())

Upvotes: 2

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