Running JUnit 5 tests with JUnit 4

HelloJUnit5_viaJUnit4.java

package org.codefx.demo.junit5;

import org.junit.gen5.api.Test;
import org.junit.gen5.junit4.runner.JUnit5;
import org.junit.runner.RunWith;

/**
 * Typical "Hello World"; runs as a JUnit 4 test.
 */
@RunWith(JUnit5.class)
public class HelloWorldSelfContained {

	@Test
	void helloJUnit5() {
		System.out.println("Hello, JUnit 5.");
	}

}