Java 8 Lambda function that throws exception?

Question

I know how to create a reference to a method that has a String parameter and returns an int, it\'s:

Function         


        

Answer 1

You can use ET for this. ET is a small Java 8 library for exception conversion/translation.

With ET it looks like this:

// Do this once
ExceptionTranslator et = ET.newConfiguration().done();

...

// if your method returns something
Function f = (t) -> et.withReturningTranslation(() -> myMethod(t));

// if your method returns nothing
Consumer c = (t) -> et.withTranslation(() -> myMethod(t));

ExceptionTranslator instances are thread safe an can be shared by multiple components. You can configure more specific exception conversion rules (e.g. FooCheckedException -> BarRuntimeException) if you like. If no other rules are available, checked exceptions are automatically converted to RuntimeException.

(Disclaimer: I am the author of ET)