@Test public void sayHello() { assertEquals("Hello World!", new App().sayHello()); }
public String sayHello() { return "Hello World!"; }
App { public String sayHello() { return "Hello World!"; } }
App { public String sayHello() { return "Hello World!"; }  }
App { public String sayHello() { return "Hello World!"; }  static void main(String[] args); String sayHello(); }
App { public String sayHello() { return "Hello World!"; }  static void main(String[] args); String sayHello();  }