Swing GUI IOException 和 FileNotFoundException

Question

我正在尝试通过单击按钮使用 WindowBuilder 将文本文件中的数据加载到 JList 中。正如您从下面的代码中看到的那样，我遇到了一些我似乎无法修复的异常。导入 java.io.FileReader 没有帮助。

我有一个单独的类文件，其中包含我的分数向量的代码。

    JButton btnLoadData = new JButton("Load Data");
    btnLoadData.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {

            String sLine;

            Vector<Score> scoreVec = new Vector<Score>();

            //Here I am getting a FileNotFoundException for (new FileReader("scores.txt")
            BufferedReader in = new BufferedReader(new FileReader("scores.txt")); 


            //Here I am getting an IOException for in.readLine()
            while ((sLine = in.readLine()) != null)
            {
                scoreVec.addElement(new Score(sLine));
            }

            //this is also throwing an IOException
            in.close();


            //Placeholders until I get the rest of the program working
            System.out.println(scoreVec.get(1).name);
            System.out.println(scoreVec.get(1).country);
        }
    });
    btnLoadData.setBounds(10, 227, 89, 23);
    frame.getContentPane().add(btnLoadData);

Answer 1

您需要捕获并处理引发的异常，例如...

public void actionPerformed(ActionEvent arg0) {

    String sLine;

    Vector<Score> scoreVec = new Vector<Score>();

    //Here I am getting a FileNotFoundException for (new FileReader("scores.txt")
    try (BufferedReader in = new BufferedReader(new FileReader("scores.txt"))) {

        //Here I am getting an IOException for in.readLine()
        while ((sLine = in.readLine()) != null) {
            scoreVec.addElement(new Score(sLine));
        }

    } catch (IOException exp) {
        exp.printStackTrace();
    }

    //Placeholders until I get the rest of the program working
    System.out.println(scoreVec.get(1).name);
    System.out.println(scoreVec.get(1).country);
}

请参阅Exceptions trail 和The try-with-resources Statement 了解更多详情

Answer 2

相关类和scores.txt的真实路径是什么

我不推荐，但只有一个可以使用 score.txt 文件的完整路径。