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public class MyTest13 {    public static void main(String[] args){        ClassLoader classLoader = ClassLoader.getSystemClassLoader();        System.out.println(classLoader);        while (null != classLoader){            classLoader = classLoader.getParent();            System.out.println(classLoader);        }    }}

可以看到Java自带的类加载器结构如下：

public class MyTest14 {    public static void main(String[] args) throws Exception{        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();        String resourceName = "com/yshuoo/jvm/classloader/MyTest13.class";        Enumeration
   
     urls = classLoader.getResources(resourceName);        while (urls.hasMoreElements()){            URL url = urls.nextElement();            System.out.println(url);        }        System.out.println("**************");        Class
     clazz = MyTest14.class;        System.out.println(clazz.getClassLoader());        clazz = String.class;        System.out.println(clazz.getClassLoader());    }}
   

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