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/**
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* 可锁定接口
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* 定义了所有可锁定设备必须实现的锁定功能
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*/
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public interface Lockable {
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/**
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* 锁定设备
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*/
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void lock();
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/**
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* 解锁设备
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*/
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void unlock();
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/**
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* 检查设备是否已锁定
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* @return 是否锁定
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*/
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boolean isLocked();
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} |
