Add ReverseStringUsingStack utility for reversing strings using stack

Author: navaneedan07

src/main/java/com/thealgorithms/stacks/ReverseStringUsingStack.java

@@ -3,32 +3,24 @@
 import java.util.Stack;
 
 public final class ReverseStringUsingStack {
-    
-    private ReverseStringUsingStack() {
-    }
-
-    /**
-     * @param str string to be reversed using stack
-     * @return reversed string
-     */
-
-    public static String reverse(String str) {
-
-        Stack<Character> stack = new Stack<>();
-        StringBuilder reversedString = new StringBuilder();
-
-
-        if (str.isEmpty()) {
-            return str;
-        }
-        for (char i : str.toCharArray()) {
-            stack.push(i);
-        }
-        while (!stack.isEmpty()) {
-            reversedString.append(stack.pop());
-        }
-
-        return reversedString.toString();
+private ReverseStringUsingStack() {
+}
 
-     }
+/**
+ * @param str string to be reversed using stack
+ * @return reversed string
+ */
+public static String reverse(String str) {
+    Stack<Character> stack = new Stack<>();
+    StringBuilder reversedString = new StringBuilder();
+
+    if (str.isEmpty()) return str;
+    for (char i : str.toCharArray()) {
+        stack.push(i);
+    }
+    while (!stack.isEmpty()) {
+        reversedString.append(stack.pop());
+    }
+    return reversedString.toString();
+}
 }