Java类类getClassLoader（）方法及示例

编程汇总 • 2025-01-17 10:27 • 阅读 4

类的类getClassLoader()方法 (Class class getClassLoader() method)

getClassLoader() method is available in java.lang package.
getClassLoader()方法在java.lang包中可用。

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。

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。

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：

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：

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。

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

Java类类getClassLoader（）方法及示例

类的类getClassLoader()方法 (Class class getClassLoader() method)

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