When to catch java.lang.Error?

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Generally, never.

However, sometimes you need to catch specific errors.

If you’re writing framework-ish code (loading 3rd party classes), it might be wise to catch LinkageError (no class def found, unsatisfied link, incompatible class change).

I’ve also seen some stupid 3rd-party code throwing subclasses of Error, so you’ll have to handle those as well.

By the way, I’m not sure it isn’t possible to recover from OutOfMemoryError.

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