From d7fb2edf0cdb0c5ae1ec5c6e8162bc23c5f893c6 Mon Sep 17 00:00:00 2001
From: 8ga <jkwlstv@outlook.com>
Date: Fri, 10 Jan 2025 11:14:41 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20ArrayReverse.java?=
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---
 ArrayReverse.java | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 ArrayReverse.java

diff --git a/ArrayReverse.java b/ArrayReverse.java
new file mode 100644
index 0000000..7c7fc99
--- /dev/null
+++ b/ArrayReverse.java
@@ -0,0 +1,21 @@
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class ArrayReverse {
+    // ArrayList 反转元素
+    // 双指针解法
+    // 出自 java.util.Collections#reverse
+    public static void main(String[] args) {
+        List<Integer> list = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5, 6, 7));
+        int size = list.size();
+        Integer x, y;
+        for (int begin = 0, mid = size >> 1, end = size - 1; begin < mid; begin++, end--) {
+            x = list.get(begin);
+            y = list.get(end);
+            list.set(begin, y);
+            list.set(end, x);
+        }
+        System.out.println(list);
+    }
+}