从.txt文件读取双打

Question

I'm trying to read a .txt file which has a line of 3 elements, the first being a string such as "tri" and then the next two are doubles like 2.3 and 4.2. The problem is, I keep getting a compiler error when I try to read the next double. If anyone can help me out I would greatly appreciate it. This is my problematic code:

            if(order.equals("printAll"))
            {
                printAll();
                if(textReader.hasNext())
                {
                    order = textReader.next();
                    if(textReader.hasNextDouble())
                    {
                        dimension1 = textReader.nextDouble();
                        dimension2 = textReader.nextDouble();  <---**this line**
                    }
                }
            }

The line I pointed at keeps giving me the error:

Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextDouble(Unknown Source)
at arrayDrawer.main(arrayDrawer.java:88)

Line 88 being the line I pointed to. Sorry if it's vague, I will post more of my code if need be. Any help would be greatly appreciated.

Input for the program:

rec 4.2 4.0
tri 4.9 9.3
tri 2.1 9.9
compAreaAll
printAll 
del 4.9
printAll

Answer 1

With that input, your program is reading the final "printAll", then "del" as the order number, then "4.9" as a double, then it tries to use nextDouble to read the final "printAll" and fails. The order "del" should be followed by two doubles.