package com.mayikt.service;  /**  * @ClassName YouShenInterface  * @Author 蚂蚁课堂余胜军 QQ644064779 www.mayikt.com  * @Version V1.0  **/ @FunctionalInterface public interface YouShenInterface {      String get(int i, int j); }






package com.mayikt;  import com.mayikt.service.YouShenInterface;  /**  * @ClassName Test04  * @Author 蚂蚁课堂余胜军 QQ644064779 www.mayikt.com  * @Version V1.0  **/ public class Test04 {     public static void main(String[] args) {         //1.使用匿名内部类调用 //        YouShenInterface youShenInterface = new YouShenInterface() { //            @Override //            public String get(int i, int j) { //                return i + "--" + j; //            } //        }; //        System.out.println(youShenInterface.get(1, 2));         //2.使用lamdba 调用有参数函数方法         YouShenInterface youShenInterface2 = (i, j) -> {             return i + "--" + j;         };         System.out.println(youShenInterface2.get(1, 1));     } }