class AccessClassLoader extends ClassLoader
时间: 2023-11-16 22:04:20 浏览: 37
AccessClassLoader is a custom class loader that extends the ClassLoader class. It is used to dynamically load classes at runtime from a specific directory or JAR file.
When a class is requested to be loaded, the AccessClassLoader checks if it has already been loaded by the parent class loader. If it has not been loaded, it searches for the class in the specified directory or JAR file. If the class is found, it is loaded and returned to the calling code.
This class loader can be useful in scenarios where you need to load classes that are not available on the classpath at compile time, or when you want to dynamically update a class without restarting the application.
相关问题
class NumberFormatException extends IllegalArgumentException {
class NumberFormatException extends IllegalArgumentException是一个Java类的定义。它继承自IllegalArgumentException,也就是说它是IllegalArgumentException的子类。
NumberFormatException是一个运行时异常,它通常在将字符串转换为数字时出现。当使用像Integer.parseInt("ab3")这样的方法将一个非数字字符串转换为整数时,就会抛出NumberFormatException异常。
这个类的定义没有给出具体的实现,而是继承了IllegalArgumentException的实现。IllegalArgumentException是RuntimeException的子类,它通常用于在方法参数不满足预期条件时抛出异常。
所以,class NumberFormatException extends IllegalArgumentException是用来表示在将字符串转换为数字时可能出现的异常情况,并提供了相应的异常处理机制。
class BB extends AA
class BB extends AA是一个Java中的类继承关系的声明。它表示BB类是AA类的子类,也可以称为派生类或子类。 这意味着BB类继承了AA类的属性和方法,并且可以在BB类中添加新的属性和方法,或者重写继承自父类的方法。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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