Finding first duplicate element in a string

Author: viveknaskar

src/FirstDuplicateElementFromAString.java

@@ -0,0 +1,21 @@
+import java.util.Arrays;
+import java.util.LinkedHashMap;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+public class FirstDuplicateElementFromAString {
+
+ public static void main(String[] args) {
+
+ String phrase = "this is the best day of my life";
+
+ String firstDuplicateElement = Arrays.stream(phrase.trim().split(""))
+ .collect(Collectors.groupingBy(Function.identity(), LinkedHashMap::new, Collectors.counting()))
+ .entrySet()
+ .stream()
+ .filter(x -> x.getValue() > 1)
+ .findFirst().get().getKey();
+
+ System.out.println("The first duplicate element: " + firstDuplicateElement);
+ }
+}