java8 stream join_Java8之流Stream使用，附上例子
packagestream;import java.util.*;importjava.util.concurrent.CopyOnWriteArrayList;importjava.util.stream.Collectors;importjava.util.stream.IntStream;importjava.util.stream.Stream;public classsteamMain {public static voidmain(String[] args) {/*** map函数
* 将流中的每?个元素 T 映射为 R(类似类型转换)
* 上堂课的例?就是，类似遍历集合，对集合的每个对象做处理
* 场景：转换对象，如javaweb开发中集合??的DO对象转换为DTO对象*/List list = Arrays.asList("springboot教程", "微服务教程", "并发编程", "压?测试", "架构课程");
List resultlist = list.stream().map(obj -> "我想学习" +obj).collect(Collectors.toList());
System.out.println(resultlist);
List list1 = Arrays.asList(new user(12, "123"), new user(23, "234"), new user(24, "345"));
List resLIst = l
packagestream;import java.util.*;importjava.util.concurrent.CopyOnWriteArrayList;importjava.util.stream.Collectors;importjava.util.stream.IntStream;importjava.util.stream.Stream;public classsteamMain {public static voidmain(String[] args) {/*** map函数 * 将流中的每?个元素 T 映射为 R(类似类型转换) * 上堂课的例?就是，类似遍历集合，对集合的每个对象做处理 * 场景：转换对象，如javaweb开发中集合??的DO对象转换为DTO对象*/List list = Arrays.asList("springboot教程", "微服务教程", "并发编程", "压?测试", "架构课程"); List resultlist = list.stream().map(obj -> "我想学习" +obj).collect(Collectors.toList()); System.out.println(resultlist); List list1 = Arrays.asList(new user(12, "123"), new user(23, "234"), new user(24, "345")); List resLIst = l