我可以在同一个catch子句中捕获多个Java异常吗？ [英] Can I catch multiple Java exceptions in the same catch clause?

问题描述

在Java中，我想做这样的事情：

In Java, I want to do something like this:

try {
    ...     
} catch (/* code to catch IllegalArgumentException, SecurityException, 
            IllegalAccessException, and NoSuchFieldException at the same time */) {
   someCode();
}

...而不是：

try {
    ...     
} catch (IllegalArgumentException e) {
    someCode();
} catch (SecurityException e) {
    someCode();
} catch (IllegalAccessException e) {
    someCode();
} catch (NoSuchFieldException e) {
    someCode();
}

有没有办法做到这一点？

Is there any way to do this?

推荐答案

这是可能的。多捕获块的语法是：

This has been possible since Java 7. The syntax for a multi-catch block is:

try { 
  ...
} catch (IOException | SQLException ex) { 
  ...
}

记住，虽然，如果所有异常属于同一个类层次结构，则可以简单地捕获该基本异常类型。

Remember, though, that if all the exceptions belong to the same class hierarchy, you can simply catch that base exception type.

另请注意，您不能同时捕获ExceptionA和ExceptionB如果ExceptionB是从ExceptionA直接或间接继承的，则阻止。编译器会抱怨：

Also note that you cannot catch both ExceptionA and ExceptionB in the same block if ExceptionB is inherited, either directly or indirectly, from ExceptionA. The compiler will complain:

Alternatives in a multi-catch statement cannot be related by subclassing
  Alternative ExceptionB is a subclass of alternative ExceptionA

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