spring boot 在jdk 1.7下使用 commandLineRunner

在spring boot 中有一段代码，使用的是java 1.8的语法：

    @Bean
    public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
        return args -> {

            System.out.println("Let's inspect the beans provided by Spring Boot:");

            String[] beanNames = ctx.getBeanDefinitionNames();
            Arrays.sort(beanNames);
            for (String beanName : beanNames) {
                System.out.println(beanName);
            }

        };
    }

在java 1.7下要如何使用呢？

    @Bean
    public CommandLineRunner commandLineRunner(final ApplicationContext ctx) {
        return new CommandLineRunner() {
            public void run(String[] args) {
                System.out.println("Let's inspect the beans provided by Spring Boot:");
                String[] beanNames = ctx.getBeanDefinitionNames();
                Arrays.sort(beanNames);
                for (String beanName : beanNames) {
                    System.out.println(beanName);
                }
            }
        };
    }