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getStatuses 时不时就会 throw null,这个是什么原因导致的?没有异常记录
The text was updated successfully, but these errors were encountered:
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getStatuses 函数可能会返回 null 或抛出异常的原因可能有以下几种:
getStatuses
null
硬件或连接问题:getStatuses 函数与通过串口连接的打印机进行交互。如果硬件或连接出现问题,可能会导致函数失败或返回 null [1][2]。
状态字节解析错误:getStatuses 函数依赖于从打印机接收的状态字节。如果在读取或解释这些字节时出现问题,也可能导致异常或 null 值 [1][2]。
缺乏错误处理机制:如果函数内部没有适当的错误处理或回退机制,遇到意外的 null 值或异常时可能会直接抛出错误 [1][2]。
建议检查硬件连接的稳定性,并在代码中添加适当的错误处理和日志记录,以便更好地诊断和解决问题。
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getStatuses 时不时就会 throw null,这个是什么原因导致的?没有异常记录
The text was updated successfully, but these errors were encountered: