DISQUS

.k · 2 years ago

It can actually be a lot easier than Anders' example. See this http://weblogs.java.net/blog/crazybob/archive/2...
for even more clever implementations. :-)

I propose a utility-class with something like this, and we're good to go:

public static void throwUnchecked(final Throwable pException) {
// Type parameter to Thrower is erased at compile-time
new Thrower().sneakyThrow(pException);
}

private static class Thrower {
private void sneakyThrow(Throwable pException) throws T {
throw (T) pException; // Unchecked cast
}
}

I'm starting to think this might be useful.. Or... Maybe I'm just tired.. :-P


.k

Johannes Brodwall · 2 years ago

Hi, Harald

The code as it stands doesn't work. I expect the template code was eaten by the HTML-izer of both my blog and/or crazy bob's blog. Here is the correct code:

<pre>
public static void throwIt2(final Throwable exception) {
class Thrower<T extends Throwable> {
private void sneakyThrow(Throwable exception) throws T {
throw (T)exception;
}
}
new Thrower<RuntimeException>().sneakyThrow(exception);
}
</pre>

I don't even get a compiler warning. This is a very neat trick.