From d63d2696867cfecd4780910d1ef28bc8e10b8857 Mon Sep 17 00:00:00 2001
From: Evan Thomas <ethomas0512@gmail.com>
Date: Tue, 9 Jan 2024 11:04:18 -0800
Subject: [PATCH] Added isUnique Method

---
 src/Main.java | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/Main.java b/src/Main.java
index 930198c..e91c0d6 100644
--- a/src/Main.java
+++ b/src/Main.java
@@ -1,3 +1,5 @@
+import java.util.HashMap;
+
 //TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
 // click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
 public class Main {
@@ -12,4 +14,20 @@ public static void main(String[] args) {
             System.out.println("i = " + i);
         }
     }
+
+    public static Boolean isUnique(String input) {
+        if (!input.isEmpty()) {
+            input = input.toLowerCase();
+            HashMap<Character, Integer> uniqueCharacters = new HashMap<>();
+            for (int i = 0; i < input.length(); i++) {
+                if (uniqueCharacters.containsKey(input.charAt(i))) {
+                    System.out.println(input.charAt(i));
+                    return false;
+                } else {
+                    uniqueCharacters.put(input.charAt(i), 1);
+                }
+            }
+        }
+        return true;
+    }
 }
\ No newline at end of file