ClassLoader类的getParent()方法 (ClassLoader Class getParent() method)

• getParent() method is available in java.lang package.

  getParent()方法在java.lang包中可用。

• getParent() method is used to return the parent class loader for delegations.

  getParent()方法用于返回委托的父类加载器。

• getParent() 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.

  getParent()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• getParent() method is a final method, it does not override in child class.

  getParent()方法是最终方法，它不会在子类中重写。

• getParent() method may throw an exception at the time of returning ClassLoader.

  返回ClassLoader时， getParent()方法可能会引发异常。

  SecurityException: This exception may throw when its checkPermission() method does not allow access to the parent class loader of this loader when the security manager exists.

  SecurityException ：当存在安全管理器时，如果其checkPermission()方法不允许访问此加载器的父类加载器，则可能引发此异常。

Syntax:

句法：

    protected  final ClassLoader getParent();

Parameter(s):

参数：

• 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 a parent class loader.

该方法的返回类型为ClassLoader ，它返回父类加载器。

Example:

例：

// Java program to demonstrate the example
// of ClassLoader getParent() method of ClassLoader
public class GetParentOfClassLoader {public static void main(String args[]) throws ClassNotFoundException {// It loads the class
Class cl = Class.forName("GetParentOfClassLoader");
// It returns the class loader associated with
// the given class
ClassLoader loader = cl.getClassLoader();
// Display Loader Class
System.out.println("Loader Class : ");
System.out.println(loader.getClass());
System.out.println();
// Display Loader Class Parent
System.out.println("Loader Parent Class : ");
System.out.println(loader.getParent());
}
}

Output

输出量

Loader Class :
class jdk.internal.loader.ClassLoaders$AppClassLoaderLoader Parent Class :
[email protected]

翻译自: https://www.includehelp.com/java/classloader-getparent-method-with-example.aspx