charAt not working for strings from a file - string

Question

Im using the charAt function to find the first and second letters in a string that was read from a file but after getting the first character from the charAt(0) line, charAt(1), throws an exection that the string is too short when I know it is not. Here is the code.
while(inputFile.hasNext()){
//read file first line
String line = inputFile.nextLine();
//if the first 2 letters of the line the scanner is reading are the same
//as the search letters print the line and add one to the linesPrinted count
String lineOne = String.valueOf(line.charAt(0));
String lineTwo = String.valueOf(line.charAt(1));
String searchOne = String.valueOf(search.charAt(0));
String searchTwo = String.valueOf(search.charAt(1));
if (lineOne.compareToIgnoreCase(searchOne) == 0 && lineTwo.compareToIgnoreCase(searchTwo) == 0){
System.out.println(line);
linesPrinted++;
}
}
I've tried checking the make sure the string isn't being changed after the charAt(0) use by printing and I know it isn't and I've run the program with no probems after just removing the line so I am sure it is this that's causing the problem

Answer 1

The only functional change needed would to change hasNext to hasNextLine.
As one might encounter a line shorter than 2, say an empty line at the end of file, check the length.
while (inputFile.hasNextLine()) {
// read file next line
String line = inputFile.nextLine();
if (line.length() < 2) {
continue;
}
// if the first 2 letters of the line the scanner is reading are the same
// as the search letters print the line and add one to the linesPrinted count
String lineOne = line.substring(0, 1);
String lineTwo = lin.substring(1, 2);
String searchOne = search.substring(0, 1);
String searchTwo = search.substring(1, 2);
if (lineOne.equalsIgnoreCase(searchOne) && lineTwo.equalsIgnoreCase(searchTwo)) {
System.out.println(line);
linesPrinted++;
}
}
There is a problem with special chars and other languages, scripts. A Unicode code point (symbol, character) can be more than one java char.
while (inputFile.hasNextLine()) {
// read file next line
String line = inputFile.nextLine();
if (line.length() < 2) {
continue;
}
// if the first 2 letters of the line the scanner is reading are the same
// as the search letters print the line and add one to the linesPrinted count
int]} lineStart = line.codePoints().limit(2).toArray();
int]} searchStart = search.codePoints().limit(2).toArray();
String lineKey = new String(lineStart, 0, lineStart.length);
String searchKey = new String(searchStart, 0, searchStart.length);
if (lineKey.equalsIgnoreCase(searchKey)) {
System.out.println(line);
linesPrinted++;
}
}