@Test public void testApp() { hello.helloWorld(); }
public void helloWorld() { System.out.printf("Hello %s!%n", name); }
Hello { public void helloWorld() { System.out.printf("Hello %s!%n", name); } }
Hello { public void helloWorld() { System.out.printf("Hello %s!%n", name); }  }
Hello { public void helloWorld() { System.out.printf("Hello %s!%n", name); }  void helloWorld(); }
Hello { public void helloWorld() { System.out.printf("Hello %s!%n", name); }  void helloWorld();  }