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java如何获取某个文件夹下所有.class文件?

目前我这边只完成了同步的循环扫描并获取.class文件,但是如果文件多的话这样效率会比较低,我这边目前想的是每遇到一个子文件夹就从线程池中获取一个线程去扫描,现在遇到的问题就是,如何把这些子线程的class文件统一设置到一个set集合并返回?


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使用并发容器,或者同步共享变量。


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