java - for循环中异步转同步如何改造？

Answer 1

Try to modify it and use java.util.concurrent.CompletionService

Answer 2

Production->Consumption->Production->Consumption....

Such a request why Mao needs to open a thread

Answer 3

消费者全部消费完数据之后，再执行for循环的第二次循环, then what’s the point of starting a thread? , just execute it synchronously