Pedro IsUnique

src/Main.java

@@ -11,5 +11,29 @@ public static void main(String[] args) {
             // for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
             System.out.println("i = " + i);
         }
+        System.out.println("Is 'string' a unique word: " +isUnique("string"));
+        System.out.println("Is 'unique' a unique word: " + isUnique("unique"));
     }
-}
+
+        public static boolean isUnique(String word) throws StringIndexOutOfBoundsException
+        {
+            return isUnique(word, 0);
+        }
+
+        public static boolean isUnique(String word, int index) throws StringIndexOutOfBoundsException
+        {
+            char letter = word.charAt(index);
+            for (int i = 0; i < word.length(); i++)
+            {
+                if(letter == word.charAt(i) && i != index)
+                {
+                    return false;
+                }
+            }
+            if (letter == word.charAt((word.length()-1)))
+            {
+                return isUnique(word, index+1);
+            }
+            return true;
+        }
+    }