RosettaCodeData/Task/Ordered-words/Java/ordered-words-2.java

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

public final class OrderedWords {

    public static void main(String[] aArgs) throws IOException {
        List<String> ordered = Files.lines(Path.of("unixdict.txt"))
                                    .filter( word -> isOrdered(word) ).toList();

        final int maxLength = ordered.stream().map( word -> word.length() ).max(Integer::compare).get();
        ordered.stream().filter( word -> word.length() == maxLength ).forEach(System.out::println);
    }

    private static boolean isOrdered(String aWord) {
        return aWord.chars()
                    .mapToObj( i -> (char) i )
                    .sorted()
                    .map(String::valueOf)
                    .reduce("", String::concat)
                    .equals(aWord);
    }

}