Java函数式接口与Lambda表达式

 1 package learnspringboot.xiao.learnjava;
 2 
 3 /**
 4  * @author xzy
 5  * @date 2019-11-17 15:24
 6  * 说明：函数式接口
 7  */
 8 public interface FunctionalInterface {
 9     void aFunction(Object... args);
10 }

 1 package learnspringboot.xiao;
 2 
 3 import learnspringboot.xiao.learnjava.FunctionalInterface;
 4 
 5 import java.util.ArrayList;
 6 import java.util.Arrays;
 7 import java.util.Comparator;
 8 import java.util.List;
 9 
10 /**
11  * @author 肖政宇
12  * @date 2019-10-23 16:22
13  * 说明：
14  */
15 public class MainFunction {
16 
17     public static void main(String[] args) {
18         FunctionalInterface functionalInterface = (objects) -> {
19             for (Object o : objects) {
20                 System.out.println(o.toString());
21             }
22         };
23         functionalInterface.aFunction("123", "456", "aaa");
24 
25         functionalInterface = (objects) -> {
26             double total = 0;
27             for (Object o : objects) {
28                 total += Double.valueOf(o.toString());
29             }
30             System.out.println(total);
31         };
32         functionalInterface.aFunction(1,2);
33     }
34 }