从文件中读取每一行，并从中创建整数
我有一个名为membercodes.cfg 的文件。 我想读取每一行（行是这样的：555：333：989）来读取。 然后，该线必须分成 3 部分。 整数1的值为555，整数2的值为333，整数3的值为989。
谢谢大家。
I have a file called membercodes.cfg.
I want to read each line (lines are like this: 555:333:989) to be read.
Then, the line must be split in 3 parts.
Integer 1 must be valued 555, Integer 2 valued 333, and Integer 3 valued 989.
Thank you all.
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与许多编程任务一样，这实际上是将一个“大”任务拆分为小任务：
BufferedReader和BufferedReader.readLine；避免使用 FileReader，它始终使用平台默认字符编码 - 一个坏主意String.split）Integer.parseInt） ）正如另一个答案指出的那样，还有
扫描仪。我自己使用Scanner的经验有些有限，但有时感觉有点像黑魔法，当事情没有按计划进行时很难调试。另一方面，它最终可能会减少代码。无论您最终使用哪种解决方案，您都应该考虑两者...除了其他任何事情之外，这是一个有用的练习，可以像我所做的那样分解大任务，而且它也是一个学习 Java API 的各个部分是个好主意 - 包括“低级”API（例如我提到的 API）和高级 API（例如
Scanner）。As with many programming tasks, this is really a matter of splitting one "big" task into small ones:
FileInputStream,InputStreamReader,BufferedReader, andBufferedReader.readLine; avoid FileReader, which always uses the platform default character encoding - a bad idea)String.split)Integer.parseInt)As another answer points out, there's also
Scanner. My own experience withScannerhas been somewhat limited, but it sometimes feels a bit too much like black magic which is hard to debug when things don't go as planned. On the other hand, it may well end up with less code.Whichever solution you end up using, you should probably look at both of them... aside from anything else, it's a useful exercise to break up the big task as I've done, and it's also a good idea to learn the various bits of the Java API - both the "low-level" APIs such as the ones I've mentioned, and the higher-level ones like
Scanner.您是否阅读过有关 扫描仪 的内容？
Have you read about Scanner ?