Spring 3.1's extends @configuration

AppConfig.java

    @Configuration
    public class AppConfig extends HelloConfig {
        @Override
        public Hello hello() {
            Hello h = super.hello();
            h.setName("Keesun");
            return h;
        }
    }

Hello.java

public class Hello {
    
    String name;

    public void setName(String name) {
        this.name = name;
    }
    
    public void sayHello() {
        System.out.println("Hello " + name);
    }
}

HelloConfig.java

    @Configuration
    public class HelloConfig {
        @Bean
        public Hello hello() {
            Hello h = new Hello();
            h.setName("Toby");
            return h;
        }        
    }