Wrote a Java like Executorservice's go language implementation

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Practice the Go language you just learned. Goexecutors

The main usage can be seen in the Main.go file.

The main purpose is to use Java to deal with the Executorservice series of tool class mode, rewrite in go language, experience the similarities and differences between the two languages.

The first version used a shared map, which was later changed to the present, using closures to bind the data to the callable.

Experience is, go language or try to use Goroutine and Chan better.