Java ClassLoader

The ClassLoader class uses a delegation model to search for classes and resources. Each instance of ClassLoader has an associated parent class loader. When requested to find a class or resource, a ClassLoader instance will delegate the search for the class or resource to its parent class loader before attempting to find the class or resource itself. The virtual machine’s built-in class loader, called the “bootstrap class loader”, does not itself have a parent but may serve as the parent of a ClassLoader instance.

Bootstrap->
loadClass 根据 binary name 找 class 资源，
调findLoadedClass(name)检查class是否已被loaded，
如果loaded，
否则，
parent 是否未null，
否，则调用 parent.loadClass(name, false);
是，则调findBootstrapClassOrNull(name)

Loads the class with the specified **binary name**.
loadClass 根据 
    public Class<?> loadClass(String name) throws ClassNotFoundException {
        return loadClass(name, false);
    }

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