try { FileInputStream fileInputStream = new FileInputStream("factoryer.txt"); InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "UTF-8"); BufferedReader reader = new BufferedReader(inputStreamReader); String line = null; while ((line = reader.readLine()) != null) { //读取factoryer String[] fparts = line.split(" "); //账号 密码 手机号码 工厂名称 真实姓名 性别 String faccount = fparts[0]; String fpassword = fparts[1]; String fname = fparts[3];//这里有问题? if(faccount.equals(account) && fpassword.equals(pwdString)){ JOptionPane.showMessageDialog(null, fparts[3]+"管理员登录成功"); flag1 = 1; break; } } if(flag1 == 0){ JOptionPane.showMessageDialog(null, "账号或密码错误"); } reader.close(); } catch (IOException e) { e.printStackTrace(); }这段代码在连续读取文件不同行时出现数组越界
时间: 2024-02-10 12:12:12 浏览: 25
这段代码中可能出现数组越界的地方是在`String fname = fparts[3];`这一行。因为在该行之前并没有对数组长度进行检查,如果当前读取的行不满足分割后至少有4个元素,那么当程序尝试访问`fparts[3]`时就会抛出数组越界异常。建议在该行之前添加一个条件判断,确保数组长度足够。例如:
```
if (fparts.length >= 4) {
String fname = fparts[3];
// 其他操作
} else {
// 处理异常情况
}
```
相关问题
InputStreamReader read = new InputStreamReader(new FileInputStream(file), encoding);
This code creates an InputStreamReader object that reads from a file input stream with the specified encoding. The file input stream is created using the FileInputStream class and the file parameter. The encoding parameter specifies the character encoding that should be used to decode the bytes from the input stream into characters. The read variable refers to the InputStreamReader object that can be used to read characters from the file input stream.
InputStreamReader inputStream = new InputStreamReader(new FileInputStream(file), "GBK");
这段代码的作用是创建一个读取文件的输入流,并指定文件的编码格式为 GBK。其中,FileInputStream(file) 用于创建文件输入流,file 是要读取的文件对象;InputStreamReader 是一个输入流读取器,用于将字节流转换为字符流;"GBK" 是指定的字符编码格式,表示使用 GBK 编码来解析字节流。这样,通过 inputStream 就可以读取指定文件的内容,并以 GBK 编码的方式将其转换为字符流。