Day-6 : Group the strings based on the middle character

Author: kumarcodes

src/main/java/com/java8/CheckDistinctValuesInArray.java

@@ -0,0 +1,16 @@
+package com.java8;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public class CheckDistinctValuesInArray {
+    public static void main(String[] args) {
+        int[] arr = {1, 2, 0, 5, 7, 9, 0};
+        List<Integer> integerList = Arrays.stream(arr).boxed().toList();
+        Map<Integer, Long> countMap = integerList.stream().collect(Collectors.groupingBy(x -> x, Collectors.counting()));
+        boolean distinctChecker = countMap.values().stream().noneMatch(x -> x > 1);
+        System.out.println("Given array contains distinct elements: " + distinctChecker);
+    }
+}

src/main/java/com/java8/GroupStrings.java

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+package com.java8;
+
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class GroupStrings {
+    public static void main(String[] args) {
+        String[] strList = {"ewe", "aha", "jji", "kwk", "jhj"};
+        System.out.print(Stream.of(strList).collect(Collectors.groupingBy(x -> x.substring(1, 2))));
+    }
+}