如何查看读者是否在EOF？ [英] How to see if a Reader is at EOF?

问题描述

我的代码需要读入所有文件。目前我正在使用以下代码：

My code needs to read in all of a file. Currently I'm using the following code:

BufferedReader r = new BufferedReader(new FileReader(myFile));
while (r.ready()) {
  String s = r.readLine();
  // do something with s
}
r.close();

如果文件当前为空，那么 s 为null，这不好。是否有 Reader 有 atEOF（）方法或等价物？

If the file is currently empty, though, then s is null, which is no good. Is there any Reader that has an atEOF() method or equivalent?

推荐答案

您尝试做的标准模式是：

A standard pattern for what you are trying to do is:

BufferedReader r = new BufferedReader(new FileReader(myFile));
String s = r.readLine();
while (s != null) {
    // do something with s
    s = r.readLine();
}
r.close();

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