Throw checked exception without declaring and create useful Stream friendly functional interfaces which throws Exception

SneakyThrow.java

public class SneakyThrow
{
  public static RuntimeException uncheckedThrow(Throwable t)
  {
    throw uncheckedThrow0(t);
  }

  @SuppressWarnings("unchecked")
  private static <X extends Throwable> RuntimeException uncheckedThrow0(Throwable t) throws X
  {
    throw (X) t;
  }

  public interface CheckedFunction<I, O>
  {
    public O apply(I i) throws Exception;
  }

  public static <I, O> Function<I, O> uncheckedFunction(CheckedFunction<I, O> cf)
  {
    return (I i) ->
      {
        try
        {
          return cf.apply(i);
        }
        catch (Exception e)
        {
          throw uncheckedThrow(e);
        }
      };
  }

  public static void main(String[] args)
  {
    Path[] paths = {};
    Stream.of(paths).flatMap(SneakyThrow.uncheckedFunction(Files::lines));
  }
}