ClassLoader类setPackageAssertionStatus()方法 (ClassLoader Class setPackageAssertionStatus() method)

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

  setPackageAssertionStatus()方法在java.lang包中可用。

• setPackageAssertionStatus() method is used to sets the package assertion status for the named package and this default status determines the classes instantiated in the future belong to named package or any of its child package.

  setPackageAssertionStatus()方法用于设置命名程序包的程序包断言状态，此默认状态确定将来实例化的类属于命名程序包或其任何子程序包。

• setPackageAssertionStatus() 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.

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

• setPackageAssertionStatus() method does not throw an exception at the time of the set assertion status of the package.

  setPackageAssertionStatus()方法在设置包的声明状态时不会引发异常。

Syntax:

句法：

    public void setPackageAssertionStatus (String pack_name, boolean status);

Parameter(s):

参数：

• String pack_name – represents the name of the package whose default assertion status is to be set.

  字符串pack_name –表示要设置其默认断言状态的程序包的名称。

• boolean status – It sets true when class loaded by this loader and belongs to the given named package will have assertion true by default otherwise it returns false.

  布尔状态 –当此加载器加载的，属于给定命名包的类默认为true时，设置为true，否则返回false。

Return value:

返回值：

The return type of this method is void, it returns nothing.

此方法的返回类型为void ，不返回任何内容。

Example:

例：

// Java program to demonstrate the example 
// of void setPackageAssertionStatus () method of ClassLoader 
public class setPackageAssertionStatusOfClassLoader {
public static void main(String[] args) throws Exception {
// Load a class
Class cl = Class.forName("setPackageAssertionStatusOfClassLoader");
// It returns the ClassLoader associated with the
// class Object
ClassLoader loader = cl.getClassLoader();
// Display loader
System.out.println("loader Class: " + loader.getClass());
// By using setPackageAssertionStatus() method is to set the 
// assertion status of the given package
loader.setPackageAssertionStatus("java.util", true);
}
}

Output

输出量

loader Class: class jdk.internal.loader.ClassLoaders$AppClassLoader

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