solution 344 by java

Author: xiao2shiqi

src/main/java/Solution344.java

@@ -0,0 +1,26 @@
+/**
+ * LC#348: reverse string 反转字符串
+ * Link：https://leetcode-cn.com/problems/reverse-string/
+ * Solution：双指针，跟反转数组差不多。。。
+ */
+public class Solution344 {
+
+    public static void reverseString(char[] s) {
+        int n = s.length, left = 0, right = n - 1;
+        while (left < right) {
+            char tmp = s[left];
+            s[left] = s[right];
+            s[right] = tmp;
+            left++; right--;
+        }
+    }
+
+    public static void main(String[] args) {
+        char[] s = {'h', 'e', 'l', 'l'};
+        reverseString(s);
+        for (char c : s) {
+            System.out.println(c);
+        }
+//        System.out.println(Arrays.toString(s));
+    }
+}