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java8 stream？
    有2个疑问？ 1：不要修改在执行某项流操作后会将元素返回到流中的集合 所有的集合不都是对他进行某项流操作后就会将元素返回到流中吗？ 2：流不会收集他们的数据，数据总是在单独的集合中 上面第一条写明对集合进行某项修改操作后会将元 ... 改了这样的集合流操作的结果就是未定义的，对应到图2，这个forEach为啥不能这样写？为啥修改集合了流操作结果就是未定义的？...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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