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Snailclimb merged 1 commit into from
Jan 25, 2022
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Update memory-area.md #1507

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2 changes: 1 addition & 1 deletion docs/java/jvm/memory-area.md
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Expand Up @@ -266,7 +266,7 @@ JDK1.4 中新加入的 **NIO(New Input/Output) 类**，引入了一种基于**

在 Hotspot 虚拟机中，对象在内存中的布局可以分为 3 块区域：**对象头**、**实例数据**和**对齐填充**。

**Hotspot 虚拟机的对象头包括两部分信息**，**第一部分用于存储对象自身的运行时数据**（哈希码、GC 分代年龄、锁状态标志等等），**另一部分是类型指针**，即对象指向它的类元数据的指针，虚拟机通过这个指针来确定这个对象是那个类的实例。
**Hotspot 虚拟机的对象头包括两部分信息**，**第一部分用于存储对象自身的运行时数据**（哈希码、GC 分代年龄、锁状态标志等等），**另一部分是类型指针**，即对象指向它的类元数据的指针，虚拟机通过这个指针来确定这个对象是哪个类的实例。

**实例数据部分是对象真正存储的有效信息**，也是在程序中所定义的各种类型的字段内容。

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