Java文件I/O-文本文件-如何检查内容? [英] Java File I/O - Text File - How to check for content?

问题描述

我想知道，如果我有一个Java类，想查询一个txt文件，并说出类似的名字

I was wondering, If i had a java class, that wanted to consult a txt file with say a list of names like

tom
steve
jones

我如何才能在Java程序中打开文本文件，并基本上查看程序中包含的字符串是否与这些名称之一匹配?

how could i open the text file in the java program and basically see if a string contained in the program matches one of these names?

到目前为止，我已经想到了

so far i have come up with

                try {
                BufferedReader inputReader = new BufferedReader(new FileReader("users.txt"));

                while (inputReader.readLine() != null){

                }

            } catch (FileNotFoundException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            } catch (IOException ep) {
                // TODO Auto-generated catch block
                p.printStackTrace();
            }

但不要无路可走..

推荐答案

您需要存储readLine()的结果，例如:

You need to store the result of readLine(), like:

String nextLine;
while ((nextLine = inputReader.readLine()) != null){
if (nextLine.equals(stringToCheck)) {
    //do something
  }
}

(当然，其中stringToCheck是目标字符串.)

(where stringToCheck is the target string, of course.)

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