solves alternating characters

Author: anishLearnsToCode

src/strings/AlternatingCharacters.java

@@ -0,0 +1,30 @@
+// https://www.hackerrank.com/challenges/alternating-characters/problem
+
+package strings;
+
+import java.util.Scanner;
+
+public class AlternatingCharacters {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        int queries = scanner.nextInt();
+        while (queries-- > 0) {
+            String string = scanner.next();
+            System.out.println(minimumDeletions(string));
+        }
+    }
+
+    private static int minimumDeletions(String string) {
+        char current = string.charAt(0);
+        int deletions = 0;
+        for (int index = 1 ; index < string.length() ; index++) {
+            char character = string.charAt(index);
+            if (current == character) {
+                deletions++;
+            } else {
+                current = character;
+            }
+        }
+        return deletions;
+    }
+}