void (String... commands) { for (String command : commands) { switch (command) { case "Say hello" -> // line contains no height System.out.printf("Hello, %s!%n", System.getProperty("user.name")); case "Exit" -> // line contains no code System.out.println("Goodbye."); case "Multiline" -> { // a System.out.println("a"); // b System.out.println("b"); // c System.out.println("c"); } default -> // line contains code at second position and height System.out.println(command); } } }