Skip to content

修正类加载器详解中一个错误 #2690

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Snailclimb merged 1 commit into from
Jul 2, 2025
Merged

修正类加载器详解中一个错误 #2690

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Update classloader.md 
判断一个类加载器是不是被BootstrapClassLoader 加载的，应该使用XXXClaissLoader.getClass().getClassLoader()是不是为null来判断，getParent()只是获取类加载器在委派链中的父类加载器，两个是不同概念。我可以自定义一个类加载器，通过new MyClassLoader(null)主动设置parent为null打破双亲委派。但是我的MyClassLoader这个类是被AppClassLoader加载的。
  • Loading branch information
@JIANGZEHUI0319
JIANGZEHUI0319 authored Jul 2, 2025
commit 61fa045fec8504bc4d3faa0b2c608615325cdec0
2 changes: 1 addition & 1 deletion docs/java/jvm/classloader.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -101,7 +101,7 @@ JVM 中内置了三个重要的 `ClassLoader`：

除了 `BootstrapClassLoader` 是 JVM 自身的一部分之外，其他所有的类加载器都是在 JVM 外部实现的，并且全都继承自 `ClassLoader`抽象类。这样做的好处是用户可以自定义类加载器，以便让应用程序自己决定如何去获取所需的类。

每个 `ClassLoader` 可以通过`getParent()`获取其父 `ClassLoader`，如果获取到 `ClassLoader` 为`null`的话，那么该类是通过 `BootstrapClassLoader` 加载的。
每个 `ClassLoader` 可以通过`getParent()`获取其父 `ClassLoader`，如果获取到 `ClassLoader` 为`null`的话，那么该类加载器的父类加载器是 `BootstrapClassLoader` 。

```java
public abstract class ClassLoader {
Expand Down