You will now create a private variable for the process.
现在,您将为流程创建一个私有变量。
Add a private variable filename of type String to this class.
将私有变量filename添加到该类中,数据类型为String。
This code defines the private variable (nothing is visible unless annotated as Shared), and then the initialization logic.
这段代码定义私有变量(除非注释为shared的,否则所有元素都是不可见的),然后定义初始化逻辑。
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