JBehave maps textual steps to Java methods via CandidateSteps. The scenario writer need only provide annotated methods that match, by regex patterns, the textual steps.

JBehave-mapped-methods.java

public class FormTest {

    @Steps
    FormSteps endUser;

    @Given("the user is on the form page")
    public void givenTheUserIsOnTheFormPage() {
        endUser.on_the_form_page();
    }

    @When("the user enters the name '$name' and age '$age' and submits the form")
    public void whenTheUserEntersName(String name, String age) {
        endUser.enters_name(name);
        endUser.enters_age(age);
        endUser.posts_form();
    }

    @Then("they should see the error message '$errorName' for name and '$errorAge' for age")
    public void thenTheyShouldSeeErrorMessages(String errorName, String errorAge) {
        endUser.should_see_name_error(errorName);
        endUser.should_see_age_error(errorAge);
    }

}