Singleton

The class AppController is a singleton-class for controlling an application. It contains application configuration as a field:

class AppController {
    
    private static AppController instance;
    
    public AppConfig config;
    
    private AppController(AppConfig config) { 
        this.config = config;
    } 
    
    public static AppController getInstance() {
        if (instance == null) {
            instance = new AppController(loadConfig());
        }
        return instance;
    }
    
    private static AppConfig loadConfig() {
        return new AppConfig(1000, "https://hyperskill.org");
    }
}

class AppConfig {
    
    public int timeout;
    public String serviceUrl;
    
    public AppConfig(int timeout, String serviceUrl) {
        this.timeout = timeout;
        this.serviceUrl = serviceUrl;
    }
}

What does the following code print?

AppController controller = AppController.getInstance();
controller.config.timeout = 2000;
        
AppController anotherOne = AppController.getInstance();
controller.config = new AppConfig(anotherOne.config.timeout + 100, "https://hyperskill.org/topics/knowledge-graph");

System.out.println(anotherOne.config.timeout + " " + controller.config.serviceUrl);