Question

以下是我目前的功能。它工作正常，如果找到lineToCompare则返回true。

public static int checkrank(String lineToCompare){
    try{
        // Open the file that is the first 
        // command line parameter
        FileInputStream fstream = new FileInputStream("ranks.txt");

        // Get the object of DataInputStream
        DataInputStream in = new DataInputStream(fstream);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));

        String strLine;
        //Read File Line By Line

        while ((strLine = br.readLine()) != null)   {
        //Compare the line with the line to compare (string)
        if(strLine.trim().compareTo(lineToCompare) == 0)
          return true;
        }

        //Close the input stream
        in.close();
    }catch (Exception e){//Catch exception if any
        System.err.println("Error: " + e.getMessage());
    }

    return false;

}

但是，我需要它来找到lineToCompare之后的行。

这是一个示例文本文件：

xXPwnageLolXx
1
SomethingTest
0
AnotherSomething
3

我需要它来查找文本行（lineToCompare），然后返回找到的行后面的数字。我该怎么做？

Answer 1

while ((strLine = br.readLine()) != null)   {
    //Compare the line with the line to compare (string)
    if(strLine.trim().compareTo(lineToCompare) == 0) {
      //I found it!  Read the next line...
      final String lineAfter = br.readLine();
      return Integer.parseInt(lineAfter);    
    }
}

我已编辑此片段以包含Dowards建议。本地变量是不必要的，我只是为了便于阅读而留下它。

Java - 从文件中获取行

1 个答案: