ChenSongJavaCoder
diff --git a/‎notes/Java 虚拟机.md
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diff --git a/‎notes/剑指 offer 题解.md
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@@ -169,7 +169,7 @@ finalize() 类似 C++ 的析构函数，用来做关闭外部资源等工作。
 
 ## 引用类型
 
-无论是通过引用计算算法判断对象的引用数量，还是通过可达性分析算法判断对象是否可达，判定对象是否可被回收都与引用有关。
+无论是通过引用计数算法判断对象的引用数量，还是通过可达性分析算法判断对象是否可达，判定对象是否可被回收都与引用有关。
 
 Java 提供了四种强度不同的引用类型。
 
 
@@ -2690,8 +2690,8 @@ public ArrayList<Integer> maxInWindows(int[] num, int size) {
     for (int i = 0; i < size; i++)
         heap.add(num[i]);
     ret.add(heap.peek());
-    for (int i = 1, j = i + size - 1; j < num.length; i++, j++) {            /* 维护一个大小为 size 的大顶堆 */
-        heap.remove(num[i - 1]);
+    for (int i = 0, j = i + size; j < num.length; i++, j++) {            /* 维护一个大小为 size 的大顶堆 */
+        heap.remove(num[i]);
         heap.add(num[j]);
         ret.add(heap.peek());
     }