捕获多个异常，而不是在混淆的构建中捕获异常

Question

I have used catch block with multiple exceptions , Which is working fine in unobfuscated build, But not catching exception in obfuscated build.

I am using proguard-maven-plugin

try {
  ...
} catch (ServletException | IOException e){
  ...
}

Is there any proguard rule i need to add for this?

Because its working fine When i write my code as

try {
  ...
} catch (ServletException e) {
  ...
} catch (IOException e) {
  ...
}

Answer 1

There can be a bug from Proguard. https://sourceforge.net/p/proguard/bugs/607/ Unfortunately no solution was provided. I suggest to avoid multi-catch until it's not fixed if possible.

Answer 2

Multi catch exception can be used when there are chances of raising exceptions without any relation(parent-child), something like IOException and ArithmeticException and NullPointerException . But you can't use multi catch block with the exception like IOException and FileNotFoundException because IOException is the parent of FileNotFoundException .

Multi catch block is given in java7 just for programmer's convenience. It doesn't affect the execution time.