添加 StringReverse.java

StringReverse.java

@@ -0,0 +1,17 @@
+public class StringReverse {
+    // 字符串反转 数组双指针解法
+    // String无法直接操作内部的char数组，避免不了2倍内存开销
+    public static void main(String[] args) {
+        String str = "1234567";
+        char[] chars = str.toCharArray();
+        int len = chars.length;
+        char x, y;
+        for (int index = 0, mid = len >> 1, end = len - 1; index < mid; index++, end--) {
+            x = chars[index];
+            y = chars[end];
+            chars[index] = y;
+            chars[end] = x;
+        }
+        System.out.println(new String(chars));
+    }
+}