From e87aebda392e89bfd94c1df1aa5e6f337edb726e Mon Sep 17 00:00:00 2001
From: wangsiyuan <2392948297@qq.com>
Date: Tue, 5 Sep 2023 00:13:25 +0800
Subject: [PATCH] =?UTF-8?q?=E5=88=9B=E5=BB=BA=20Solution.java?=
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---
 src/solution/Solution.java | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 src/solution/Solution.java

diff --git a/src/solution/Solution.java b/src/solution/Solution.java
new file mode 100644
index 0000000..cfbaae7
--- /dev/null
+++ b/src/solution/Solution.java
@@ -0,0 +1,17 @@
+package solution;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class Solution {
+    public int lengthOfLongestSubstring(String s) {
+        if (s != null){
+            Set<Character> stringList = new HashSet<>();
+            for (int i = 0; i < s.length(); i++) {
+                stringList.add(s.charAt(i));
+            }
+            return stringList.size();
+        }
+        return 0;
+    }
+}