java - FileWriter 使用什么异常

Question

我有一个程序，允许用户将信息写入文件。它不会覆盖原始文件中的所有内容，而是添加到其中。问题是，如果用户没有输入足够的信息，程序就会崩溃。

文本文件中的每一行看起来都像这样:

info 1, Info 2, info 3, info 4, info 5, info 6, info 7

Every line has six commas and seven pieces of information. So, I need to know what kind of exception to use to prevent a crash if say the user only enters 4 pieces of information or only uses two commas, etc. Anybody know how to do that?

Here's my code:

private void addDVDButtonActionPerformed(java.awt.event.ActionEvent evt) {                                             
    FileWriter fWriter = null;
    BufferedWriter writer = null;
    try {
        fWriter = new FileWriter("info.txt", true);
        writer = new BufferedWriter(fWriter);

        writer.write(JOptionPane.showInputDialog(this, "ADDING INFO"));
        writer.newLine();
        writer.close();
    } catch (Exception e) {
        JOptionPane.showMessageDialog(this,"More information required");
    }
}                        

Answer 1

不要抛出异常。验证用户输入并仅在有效时将其写入文件。