import java.nio.file.*;

class Ideone {
	public static void main(String[] args) {
		Path path = Paths.get("/some/foo");
		System.out.println("path = " + path);
		System.out.println("getFileName() = " + path.getFileName());
		
		path = path.resolveSibling(path.getFileName() + ".bar");
		System.out.println("path = " + path);
	}
}