如何使用java读取文本文件中的最后一行
问题描述:
我正在创建一个日志,我想读取log.txt文件的最后一行,但是在读取最后一行后我无法让BufferedReader停止。
I am making a log and I want to read the last line of the log.txt file, but I'm having trouble getting the BufferedReader to stop once the last line is read.
这是我的代码:
try {
String sCurrentLine;
br = new BufferedReader(new FileReader("C:\\testing.txt"));
while ((sCurrentLine = br.readLine()) != null) {
System.out.println(sCurrentLine);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)br.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
答
这里是一个很好的解决方案。
在你的代码中,你可以创建一个名为 lastLine
的辅助变量,并不断地将其重新初始化为当前行,如下所示:
Here's a good solution.
In your code, you could just create an auxiliary variable called lastLine
and constantly reinitialize it to the current line like so:
String lastLine = "";
while ((sCurrentLine = br.readLine()) != null)
{
System.out.println(sCurrentLine);
lastLine = sCurrentLine;
}