Java语言学习十八（异常）

雨点打透心脏的1/2处 2023-07-20 10:47 69阅读 0赞

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异常是程序运行过程中出现的错误。Java语言的异常处理框架是Java语言健壮性的一个重要体现。所有异常继承基类Throwable  
Java对异常的处理分为两种，一是使用try,catch进行捕捉并处理异常，二是不处理抛出异常，让其它类或者JVM去处理异常  
Java异常分为两类,一是错误，二是异常，错误是无法捕捉处理，我们只能捕捉异常。  
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代码中除零抛出算术异常，这个异常是可以避免的，对除数做非零判断可以避免这个异常，这类异常属于运行时异常，程序中没有必要取捕捉，JVM会捕捉这类异常，我们在代码中添加判断条件来避免这个异常。  
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## 处理异常 ##

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## 异常传递 ##

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## Finally子句 ##

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## 重写方法抛出的异常 ##

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## 异常排错 ##

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诊断程序错误往往根据抛出的异常堆栈，找到错误根源，所以需要掌握如何根据异常堆栈定位错误技能。

## 自定义异常 ##

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思考题  
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