Where do Before and After hooks go in Cucumber

I have a fairly simple Cucumber test framework with a feature file, a step definitions file, and a test runner class that looks like this:

@RunWith(Cucumber.class)
@CucumberOptions(features = "src/test/java/com/tests/cucumber/features/ui/ExampleTest.feature", 
                 glue = { "com.tests.cucumber.stepdefinitions" },
                 )
public class ExampleTestRunner {

}

This runs a scenario in the feature file just fine. Now I want to add a Before and After hook to do some setup and teardown, but I can't for the like of me get the hooks to run. I've tried adding the hooks to the ExampleTestRunner and to the StepDefinition class, but they never run. Where should I put these hooks? At the moment, the hooks just look like this, but I'll add content to them once I've worked this out!

@Before
public void beforeClass(Scenario scenario) {
    System.out.println("starting beforeClass()");
}

Thanks for any help.