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类的类getClassLoader()方法 (Class class getClassLoader() method)
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getClassLoader() method is available in java.lang package.
getClassLoader()方法在java.lang包中可用。
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getClassLoader() method is used to return the ClassLoader that loads the class or interface.
getClassLoader()方法用于返回加载类或接口的ClassLoader。
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getClassLoader() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
getClassLoader()方法是一个非静态方法，只能通过类对象进行访问，如果尝试使用类名称访问该方法，则会收到错误消息。
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getClassLoader() method may throw SecurityException at the time of loading class or interface.
在加载类或接口时， getClassLoader()方法可能会引发SecurityException 。
SecurityException: In this exception, its checkPermission() method does not allow access classloader for the class when the security manager exists.
SecurityException ：在此异常中，当安全管理器存在时，其checkPermission()方法不允许访问该类的类加载器。
Syntax:
句法：
public ClassLoader getClassLoader();
Parameter(s):
参数：
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It does not accept any parameter.
它不接受任何参数。
Return value:
返回值：
The return type of this method is ClassLoader, it returns the following values based on the given cases,
此方法的返回类型为ClassLoader ，它根据给定的情况返回以下值：
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It returns class loader that loads the class denoted by this object.
它返回类加载器，该加载器加载此对象表示的类。
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It returns null in case of bootstrap class loader because we don’t need to implement bootstrap class loader.
如果使用自举类加载器，则返回null ，因为我们无需实现自举类加载器。
Example:
例：
// Java program to demonstrate the example
// of ClassLoader getClassLoader() method of Class
public class GetClassLoaderOfClass {
public static void main(String[] args) throws Exception {
// It returns the Class object attached with the given
//classname
Class cl = Class.forName("GetClassLoaderOfClass");
// By using getClassLoader() is to load the class
ClassLoader class_load = cl.getClassLoader();
// If any ClassLoader associate with the Class
if (class_load != null) {
Class load_class = class_load.getClass();
System.out.print("Associated Loader Class: ");
System.out.print(load_class.getName());
}
// No Loader associated with the class
else
System.out.println("No system loader associated with the class");
}
}
Output
输出量
Associated Loader Class: jdk.internal.loader.ClassLoaders$AppClassLoader
翻译自: https://www.includehelp.com/java/class-class-getclassloader-method-with-example.aspx
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