Question

try {

      File inFile = new File("books.txt");

      if (!inFile.isFile()) {
        System.out.println("Parameter is not an existing file");
        return;
      }

      //Construct the new file that will later be renamed to the original filename. 
      File tempFile = new File(inFile + "temp.txt");

      BufferedReader br = new BufferedReader(new FileReader("books.txt"));
      PrintWriter pw = new PrintWriter(new FileWriter(tempFile));

      String line = null;

      //Read from the original file and write to the new 
      //unless content matches data to be removed.
      while ((line = br.readLine()) != null) {

        String lineToRemove;
        lineToRemove = JOptionPane.showInputDialog("Enter line to remove");
        if (!line.trim().contains(lineToRemove)) {

          pw.println(line);
          pw.flush();
        }
      }
      pw.close();
      br.close();

      //Delete the original file
      if (!inFile.delete()) {
        System.out.println("Could not delete file");
        return;
      } 

      //Rename the new file to the filename the original file had.
      if (!tempFile.renameTo(inFile))
        System.out.println("Could not rename file");

    }
    catch (FileNotFoundException ex) {
      ex.printStackTrace();
    }
    catch (IOException ex) {
      ex.printStackTrace();
    }
  }

我正在尝试创建一个方法，如果我输入该行中包含的单词，将删除.txt文件中的一行代码。我的问题是，当我运行它时，测试说它无法删除文件。代码有问题吗？我的代码也用＃分隔，如果这可能会增加问题。示例输出将是：巨人＃詹姆斯＃1993

Answer 1

我测试了你的代码并进行了微小的修改（@Andreas在写这篇文章的时候注意到了它）并且按预期工作了

(function(){}()

JAVA使用关键字从.txt文件中删除一行

1 个答案: