From 1f32922be20e5d97a20d55b0a14cd928040e8eb5 Mon Sep 17 00:00:00 2001 From: xiangwbs Date: Thu, 8 Mar 2018 19:29:04 +0800 Subject: [PATCH] merge --- .../main/java/com/xwbing/demo/LambdaDemo.java | 2 +- .../src/main/java/com/xwbing/demo/demo.java | 18 ------------------ 2 files changed, 1 insertion(+), 19 deletions(-) diff --git a/boot-service/src/main/java/com/xwbing/demo/LambdaDemo.java b/boot-service/src/main/java/com/xwbing/demo/LambdaDemo.java index 5f1aa5b..4370830 100644 --- a/boot-service/src/main/java/com/xwbing/demo/LambdaDemo.java +++ b/boot-service/src/main/java/com/xwbing/demo/LambdaDemo.java @@ -33,7 +33,7 @@ public class LambdaDemo { List lists = Arrays.asList(1, 2, 4, 2, 3, 5, 5, 6, 8, 9, 7, 10); // //遍历 // Arrays.stream(arrays).forEach(System.out::println); - list.forEach(System.out::println); + list.forEach(System.out::println);//遍历时：对象,json等引用类型可直接转换 lists.sort(Comparator.comparingInt(o -> o));//升序排序，不需要收集 System.out.println("sort:" + lists.stream().sorted((o1, o2) -> o2 - o1).collect(Collectors.toList()));//排序 System.out.println("map:" + lists.stream().map(o1 -> o1 * 2).collect(Collectors.toList()));//转换成新元素 diff --git a/boot-service/src/main/java/com/xwbing/demo/demo.java b/boot-service/src/main/java/com/xwbing/demo/demo.java index c69774e..df4ddf0 100644 --- a/boot-service/src/main/java/com/xwbing/demo/demo.java +++ b/boot-service/src/main/java/com/xwbing/demo/demo.java @@ -1,11 +1,5 @@ package com.xwbing.demo; -import com.alibaba.fastjson.JSONObject; - -import java.util.ArrayList; -import java.util.List; -import java.util.stream.Collectors; - /** * 项目名称: boot-module-demo * 创建时间: 2018/1/23 14:45 @@ -14,18 +8,6 @@ import java.util.stream.Collectors; */ public class demo { public static void main(String[] args) { - List list = new ArrayList<>(); - for (int i = 0; i <2 ; i++) { - JSONObject jsonObject=new JSONObject(); - jsonObject.put("a","a"); - jsonObject.put("b","b"); - jsonObject.put("c","c"); - list.add(jsonObject); - } - List a1 = list.stream().map(jsonObject -> - jsonObject.getString("a") - ).collect(Collectors.toList()); - System.out.println(a1); }