Today we've created a port library for java,
it ports GLM (OpenGL Maths) to Java and makes it easy for developers.
With this toolkit you will be able to have vectors and matrices with one click.
The import file is called "glm" and is the only class that you will have to import.
The sub-classes are vec2, vec3, vec4 and mat4.
All default calculations etc are included.
You can also check the source code and java documentation.
Note: if you use the files, include the license file in a "3rdparty" folder!