http://www.apache.org/licenses/LICENSE-2.0.html
This licence is referred to along with several paragraph of comments in a Java API based project I'm using for research.
I'm having difficulty understanding some of the law-speak in the license. Especially this part:
You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and
What I'm doing is creating my own classes that call the methods in the provided work, but not modifying them directly. Does this mean my file should still contain their copyright notice on the top?