Lucene - Keywords and Strings

can lucene compare strings stored in an arraylist to a string.

so i will have 10 strings which will be a sentence long. and i will want to compare each string to a set of 30 keywords stored somewhere, and then compare with another set of 30 keywords, so on.

i want to rank each string based on the number of times it matches a set of keywords. so basically i want to categorize each sentence.

is this possible with lucene, or would any other approach be more efficient.

will this process take long?

any help would be great.

thanks.