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Update java-concurrent-questions-03.md

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@ -308,7 +308,7 @@ public ScheduledThreadPoolExecutor(int corePoolSize) {
`ThreadPoolExecutor`其他常见参数 :
- `keepAliveTime`:当线程池中的线程数量大于 `corePoolSize` 的时候，即有非核心线程，这些非核心线程空闲时不会立即销毁，而是会等待，直到等待的时间超过了 `keepAliveTime`才会被回收销毁。
- `keepAliveTime`:当线程池中的线程数量大于 `corePoolSize` ，即有非核心线程（线程池中核心线程以外的线程）时，这些非核心线程空闲后不会立即销毁，而是会等待，直到等待的时间超过了 `keepAliveTime`才会被回收销毁。
- `unit` : `keepAliveTime` 参数的时间单位。
- `threadFactory` :executor 创建新线程的时候会用到。
- `handler` :拒绝策略（后面会单独详细介绍一下）。