S0071_CloseIOStreams.java

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;

interface App {

  static void main(String... args)
      throws IOException {
    var dir = Path.of(".");
    try(var files = Files.list(dir)
        .map(Path::toString)
        .filter(f -> f.endsWith(".txt"))
        .sorted()){
          System.out.println(files.toList());

        }
        
  }
}