[Java知识库]Java1.8函数式接口编程结合泛型简单使用案例demo

函数接口

@FunctionalInterface
public interface DemoFunction<T> {
    T data();
}

引用函数接口的方法

public class Demo<T extends Collection> {

    public Demo addData(T t, DemoFunction function) {
        if (t.contains(function.data())) {
            System.out.println("data:" + function.data() + " repetition not add");
        } else {
            t.add(function.data());
            System.out.println("add success data:" + function.data());
        }
        return new Demo();
    }


}

调用主方法

    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        Demo demo = new Demo();
        demo.addData(list, () -> "666")
                .addData(list, () -> "666")
                .addData(list, () -> "5555")
                .addData(list, () -> 7895)
                .addData(list, () -> true)
                .addData(list, () -> true);

        System.out.println("list = " + list);
    }

下面是运行效果，英语请忽略不计，纯散装的