parcing 文本文件中的异常错误

Question

public static void main(String[] args) throws FileNotFoundException
{
printHeading(); 

    Scanner file1 = new Scanner(new File("C:\Users\nupur\workspace\Project2\src\EmployeesIn.dat")) ;
    System.out.println("New Employee added: Pryce, Lane");
    System.out.println("New Wages: ");
    while(file1.hasNextLine())
    {
          double total =0;
          String line=file1.nextLine();
          Scanner lineData = new Scanner(line);     
          String name = lineData.next().trim();
          int comma = name.indexOf(',');
          String last = name.substring(0, comma);
          String first = lineData.next().trim();
          char status = (lineData.next().trim()).charAt(0);
          double wage = Double.parseDouble((lineData.nextLine().trim()));

它给我这个错误：新工资：

Exception in thread "main" java.lang.NumberFormatException: For input string: "5.00Baird,   Joey h 7.50Kinsey,  Paul h 8.00Olson,   Margaret                        s 15000Campbell,    Peter           s 20000Draper,  Donald s 40000Sterling, Roger s 45000Cooper,    Bertram             s 50000"
    at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)
    at sun.misc.FloatingDecimal.parseDouble(Unknown Source)
    at java.lang.Double.parseDouble(Unknown Source)
    at Project2.main(Project2.java:38)

Answer 1

您正在尝试解析最后一行中不包含双精度数的字符串。打印您实际尝试解析的输出以追踪您的错误。

Answer 2

您尝试将“5.00Baird、Joey h 7.50Kinsey、Paul h 8.00Olson、Margaret s 15000Campbell、Peter s 20000Draper、Donald s 40000Sterling、Roger s 45000Cooper、Bertram s 50000”解析为双精度。

因为这不是一个数字，所以你得到了例外。

Answer 3

这一切都非常混乱。

你做这样的事情怎么样：

public static void main(String[] args) throws FileNotFoundException {
    printHeading(); 

    Scanner file1 = new Scanner(new File("C:\Users\nupur\workspace\Project2\src\EmployeesIn.dat")) ;
    System.out.println("New Employee added: Pryce, Lane");
    System.out.println("New Wages: ");
    while(file1.hasNextLine()) {
        System.out.println("Wage = " + file1.nextLine().replaceAll("[\D]", "")) //replace all non-digit characters with blank
    }
}

parcing 文本文件中的异常错误

exception Error in parcing text file

java

inheritance

parsing

exception

text-files