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Java通过面向对象的方法进行异常处理，把各种不同的异常进行分类，并提供了良好的接口。在Java中，每个异常都是一个对象，它是Throwable类或其子类的实例。当一个方法出现异常后便抛出一个异常对象，该对象中包含有异常信息，调用这个对象的方法可以捕获到这个异常并可以对其进行处理。Java的异常处理...

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一、标识符 1、什么是标识符？ Java语言中，对于变量，常量，函数，语句块也有名字，我们统统称之为Java标识符. &nb...

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