Its constructor accepts a Boolean that determines whether a new index is created or whether an existing index is opened.

它的构造函数接收布尔值，确定是否创建新索引，或者打开现有索引。

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It is created based on data such as Boolean, Integer, Text, or Enumeration of values.

它根据布尔、整数、文本或枚举值等数据创建。

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In a long-running program, the Timer is probably best created as a daemon thread (using the constructors that take a Boolean parameter to indicate daemon status), so it won't keep the VM alive.

在长时间运行的程序中，最好创建一个Timer守护线程(使用带有指示守护线程状态的参数的构造函数)，从而它不会让VM活动。

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In a long-running program, the Timer is probably best created as a daemon thread (using the constructors that take a Boolean parameter to indicate daemon status), so it won't keep the VM alive.

在长时间运行的程序中，最好创建一个Timer守护线程(使用带有指示守护线程状态的参数的构造函数)，从而它不会让VM活动。

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