BootStrapClassLoader

Question

老师，将自己的 jar 放在JAVA_HOME/lib下，为什么写代码的时候也加载不到这个类，BootStrapClassLoader对加载类有什么要求吗?
可以让BootStrapClassLoader加载自定义的类吗

Answer 1

翔仔 2020-09-28 01:03:04

同学好，除非改造jvm，否则一般不会碰到BootStrapClassLoader，要用的话可以试试这个哈

The bootstrap class loader is represented as null, e.g. when calling Class.getClassLoader(). This can be fed directly to Class.forName(String,boolean,ClassLoader):

If the parameter loader is null, the class is loaded through the bootstrap class loader.

So, you can try to load a class explicitly through the bootstrap loader using Class.forName(className,true,null) or resolve a class relative to another class’ context using Class.forName(className,true,context.gee,context.gee,context.getClassLoader()) without having to special-case the bootstrap loader.

试试理解下英文：）