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POmethod declaration gives an error. What gives?
 

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  1. POmethod declaration gives an error. What gives?
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    <p>So I'm still plugging away at my big assignment (thanks to everyone for helping me figure out the problem with my loop). Now i have moved on to start making a checkDigit() method that is used to validate whether the check digit on the isbn # is valid (which I have only started screwing around with). Here's the problem: I tried to compile it, but the compiler tells me that there is an expected at the method call. Here is a snippet of my beginner's code:</p> <pre><code> private String validateISBN(String bookNum)throws ISBNException { boolean check=false; bookNum.replaceAll("-",""); if (bookNum.length()!=ISBN_NUM) throw new ISBNException ("ISBN "+ bookNum + " must be 10 characters"); for (int i=0;i&lt;bookNum.length()-1;i++) { if (Character.isDigit(bookNum.charAt(i))) check=true; } if (bookNum.charAt(9)=='X') check=true; if (Character.isDigit(bookNum.charAt(9))) check=true; if (check=false) throw new ISBNException ("ISBN " + bookNum + " must contain all digits" + "or 'X' in the last position"); if (checkDigit()=false) throw new ISBNException ("ISBN " + bookNum + " is invalid.\n" + "ISBN " + bookNum + " should be " + validnum); if (check=true) return bookNum; } public boolean checkDigit (bookNum) { double total=0.0; char[] check = {1,2,3,4,5,6,7,8,9,X}; int[] checkNums= {1,2,3,4,5,6,7,8,9,10}; for (int i=0;i&lt;bookNum.length;i++) check(i)=bookNum[i]; total+=check[i]*checkNums[i]; </code></pre> <p>What exactly does this mean? Normally it only means that I am missing a curly brace somewhere, but that is not the case this time. </p> <p>edit</p> <p>Sorry for the obvious and stupid question. For you guys who asked to see the actual compiler message, I put it up top (buried), it was that the compiler</p> <p>identifier expected</p> <p>but I actually put the &lt;> tags around identifier, so it took out the word identifier, and now it says, "....but the compiler tells me that there is an expected at the method call, instead of, " ....but the compiler tells me that there is an identifier expected at the method call.</p> <p>And the enter that was originally at the start was from the text field (which I am typing the question) for when I pasted the code, it said 'enter code here', and I didn't take out the enter.</p> <p>Sorry</p>
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    1. COPost the actual compilation error message. Do you expect us to GUESS what it is?
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    2. COthis code isnt complete. first there is an 'enter' word at the start that makes no sense. also, checkDigit is cut off. If this is the actual code, start there....
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    3. COThis doesn't directly solve your problem, but watch out for the difference between the equality operator == and the assignment operator =
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      1. USprasopes
 

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