@FunctionalInterface 和 abstract 关键字使用示例代码 - Java 函数式编程

@FunctionalInterface\npublic interface MyFunctionalInterface {\n void doSomething();\n}\n\npublic class Main {\n public static void main(String[] args) {\n MyFunctionalInterface myFunctionalInterface = () -> {\n System.out.println("Doing something...");\n };\n myFunctionalInterface.doSomething();\n }\n}