目录1、execute1.1、定义1.2、方法1.3、异常处理2、submit2.1、介绍2.2、方法重载形式2.3、异常处理3、核心区别对比总结关于线程池的继承关系可参考：
I am de开发者_如何学JAVAveloping an application for IPAD and I need to play two videos one after another but can not find how. I\'m using MPMoviePlayerViewController to do it and do not know how to la
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