java程序报stream has already been operated upon or closed异常错误解决方案

今天写业务的时候使用到了Stream流，用Stream流完成了list的统计和求和，但是划红线那一块我看着重复，于是把Stream流抽成了一个变量，最后导致报错。

下图是正确的写法。

解决方案： 每次创建的stream只能使用一次

不要用同一个流来做各种操作，每次都用新的。

java程序报stream has already been operated upon or closed异常错误解决方案相关推荐

java.lang.IllegalStateException: stream has already been operated upon or closed 异常
Stream流是Java8 API推出的新特性,极大的简化了我们遍历集合和筛选集合的操作,但是初次使用时极有可能出现错误. 异常如图所示: 异常意思: Java中的"流已被操作或关闭&quo ...
java.lang.IllegalStateException: stream has already been operated upon or closed
1. 错误描述 static int [] intArr = new int[]{30,96,23,69,85,62,12,99,11}; IntStream intStream =Arrays.st ...
使用Stream流时报java.lang.IllegalStateException: stream has already been operated upon or closed错误
Stream流是Java8 API推出的新特性,极大的简化了我们遍历集合和筛选集合的操作,但是初次使用时极有可能出现错误. 下面的代码按照常理来说看似是没有错误: public class Strea ...
Stream流--java.lang.IllegalStateException: stream has already been operated upon or closed
stream用了两次,forEach()已经进行了中止操作终止操作符就是对数据进行收集或者消费的,数据到了终止操作这里就不会向下流动了,终止操作符只能使用一次.
Stream报错:stream has already been operated upon or closed
Stream 有一个特点:只能使用一次 public class StreamUtils {public static void main(String[] args){StreamUtils.use ...
“Stream has already been operated upon or closed” Exception in Java
1. Overview In this brief article, we're going to discuss a common Exception that we may encounter w ...
使用stream报错：stream has already been operated upon or closed
如下例子: Stream<Role> stream = User.getRoles().stream(); stream.map(Role::getRoleTag).collect(Col ...
使用Stream编译出现的stream has already been operated upon or closed的问题
Stream: 封装一系列对单列集合/数组的操作的api 获取Stream流对象: *** 所有的流对象只能使用一次 Stream<String> stream = Stream.of(& ...
intellij-IDE运行Java程序报错：java: -source 1.5 中不支持 lambda 表达式有用
intellij-IDE运行Java程序报错:java: -source 1.5 中不支持 lambda 表达式 2017年12月29日 15:04:15 佛空如水阅读数:795 报错: 解决: 第 ...

java程序报stream has already been operated upon or closed异常错误解决方案

java程序报stream has already been operated upon or closed异常错误解决方案相关推荐

最新文章

热门文章