jgit: walk tree at specific revision

gistfile1.java

RevWalk rw = new RevWalk(repo);
RevCommit rev = rw.parseCommit(repo.resolve("HEAD"));
RevTree rt = rev.getTree();

TreeWalk tw = new TreeWalk(repo);
tw.addTree(rt);
tw.setRecursive(true);

while (tw.next()) {
	System.out.println(tw.getPathString());
}