ClassLoader類的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類加載器。

• 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()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

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

  getParent()方法是最終方法，它不會在子類中重寫。

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

  返回ClassLoader時， getParent()方法可能會引發異常。

  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 ：當存在安全管理器時，如果其checkPermission()方法不允許訪問此加載器的父類加載器，則可能引發此異常。

Syntax:

句法：

protected final ClassLoader getParent();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of this method is ClassLoader, it returns a parent class loader.

該方法的返回類型為ClassLoader ，它返回父類加載器。

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 classClassLoader loader = cl.getClassLoader();// Display Loader ClassSystem.out.println("Loader Class : ");System.out.println(loader.getClass());System.out.println();// Display Loader Class ParentSystem.out.println("Loader Parent Class : ");System.out.println(loader.getParent());} }

Output

輸出量

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

翻譯自: https://www.includehelp.com/java/classloader-getparent-method-with-example.aspx

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