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。

问题出现在以下代码中的event.getSource == inputAdd语句中。

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

这个问题很模糊，但是因为它在“inputAdd”中，我只是假设你要附加到文件，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

1 个答案: