From e4fb80c858931102ae04d9eec2a73eb42cc71cc0 Mon Sep 17 00:00:00 2001 From: "Daniel C. Andrade" Date: Fri, 26 Oct 2018 00:23:02 -0300 Subject: [PATCH] =?UTF-8?q?Primeira=20Recorr=C3=AAncia=20-=20Java?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../dcandrade/FirstRecurrence.java | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 src/primeira_recorrencia/dcandrade/FirstRecurrence.java diff --git a/src/primeira_recorrencia/dcandrade/FirstRecurrence.java b/src/primeira_recorrencia/dcandrade/FirstRecurrence.java new file mode 100644 index 0000000..15de987 --- /dev/null +++ b/src/primeira_recorrencia/dcandrade/FirstRecurrence.java @@ -0,0 +1,19 @@ +import java.util.HashSet; +import java.util.Set; + +class FirstRecurrence{ + public static Character firstRecurrence(String word){ + Set uniqueChars = new HashSet<>(); + + return word.chars() + .mapToObj(ch -> (char) ch) + .dropWhile(uniqueChars::add) // Filtra caracteres não repetidos + .findFirst() + .orElse(null); + } + + public static void main(String[] args) { + Character result = FirstRecurrence.firstRecurrence(args[0]); + System.out.println(result); + } +} \ No newline at end of file