Using bit tests, you can easily test for specific flags on a flag variable.

使用位测试，可以容易地测试标志变量上的特定标志。

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Note the use of the w: prefix, which means that the flag variable is always local to the current window.

注意使用了w：作为前缀，这表示标记变量对于当前窗口来说始终是本地变量。

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After loading the Properties object, you close the input stream, and then set your Boolean flag variable (init) value to true, demarcating that the AddressStore object has been initialized.

在加载properties对象之后，关闭输入流，然后设置布尔型标志变量(init)值为true，确定AddressStore对象已经被初始化。

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