I asked a question about arrays before, but this one won't compile
- by unit
I asked about this array a little while ago, and I can't see what the problem is. Too tired. What have I done wrong? Basically, I am taking a string array and trying to check to see if it contains numbers or an x (ISBN number validation). I want to take the number from a given input (bookNum), check the input, and feed any valid input into a new array (book). At the line
'bookNum.charAt[j]==book[i]'
I get the 'not a statement error'. What gives?
String[] book = new String [ISBN_NUM];
bookNum.replaceAll("-","");
if (bookNum.length()!=ISBN_NUM)
throw new ISBNException ("ISBN "+ bookNum + " must be 10 characters");
for (int i=0;i<bookNum.length();i++)
{
if (Character.isDigit(bookNum.charAt(i)))
bookNum.CharAt[j]==book[i];
j++;
if (book[9].isNotDigit()||
book[9]!="x" ||
book[9]!="X")
throw new ISBNException ("ISBN " + bookNum + " must contain all digits" +
"or 'X' in the last position");
