merge

boot-service/src/main/java/com/xwbing/demo/LambdaDemo.java

@@ -33,7 +33,7 @@ public class LambdaDemo {
         List<Integer> 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

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<JSONObject> 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<String> a1 = list.stream().map(jsonObject ->
-             jsonObject.getString("a")
-        ).collect(Collectors.toList());
-        System.out.println(a1);
 
 
     }