使用 BufferedWriter 和 JTextFields

Question

我在使用 BufferedWriter 从文本输入到 JTextField 中将文本写入文件时遇到问题。

问题出现在下面代码中的 event.getSource == inputAdd 语句处。

public void actionPerformed(ActionEvent event){

  Object source = event.getSource();

  if (event.getSource() == inputOpen){       
    file.openFile(inputOpenFile.getText());
    currentPlaylist = file.getFileName();
    contentList.setText(file.fileRead()); //read file
    contentTitle.setText("Current Movie Playlist: " + currentPlaylist); //set text to what's in file
  }

  if (event.getSource() == inputCreate){
    file.createFile(inputCreateFile.getText());
    currentPlaylist = file.getFileName();
    inputCreateFile.setText(""); //set text to nothing 
  }

  if (event.getSource() == inputAdd){      
    //file.openFile(inputOpenFile.getText());
    //file.createElement(inputAddMovie.getText());

    movie = inputAddMovie.getText();

    try{
      BufferedWriter writer = new BufferedWriter(new FileWriter(currentPlaylist));
      writer.write(movie);
      writer.newLine();
      writer.close();
    }catch(Exception error){
      System.out.println("There was an error");
    }


  }

Answer 1

这个问题很含糊，但由于它在 "inputAdd," 中，我假设你想追加到文件中，在这种情况下你的 FileWriter 应该是

BufferedWriter writer = new BufferedWriter(new FileWriter(currentPlaylist, true)); //notice the extra argument

http://docs.oracle.com/javase/7/docs/api/java/io/FileWriter.html#FileWriter(java.lang.String,%20boolean)

同时将您的 if 语句更改为

if(source == input....)

使用 BufferedWriter 和 JTextFields

Using BufferedWriter and JTextFields

java

jtextfield

filewriter

bufferedwriter