Are there libraries for working with sparse matrices in Java?

Question

Java

Solving the 0-1 optimization problem (a subset of integer programming (MIP) problems). The subject area is such that it is necessary to form matrices of gigantic sizes (up to 8e7 x 8e7).
The problem is that popular libraries for working with such matrices do not support rows x columns > 2^31.
Actually the question is: are there any libraries for working with such matrices or, if they are not, what strategy should be chosen for their efficient storage/generation?

Answer 1

I haven't tried it, but here's an example: https://github.com/fommil/matrix-toolkits-java
Google search for "java sparse matrix"

Answer 2

Take efficient C implementations and port them yourself to Java
http://math.nist.gov/sparselib++/