What does scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?"); do?

scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

I know about scanner.skip() but I don't know what exactly the above line does. I saw it in many programs but I don't know what exactly is happening. Can someone help me?