Android : Why does this code work on command line but not in an Andriod Studio project?

The block of code I refer to in my header is:

for (String itemOfMyNumbers : arrayOfInputLine) {

    for (int itemOfLatestNumbersArray = 2; itemOfLatestNumbersArray < 7; itemOfLatestNumbersArray++) {

        if (latestNumbersArray[itemOfLatestNumbersArray] == itemOfMyNumbers) {

              found = 1;
          }

     }
}

This block compares 2 strings both found in String[] types and if they match it sets found = 1 Pretty simple stuff.

If I compile this by hand on a command line (Linux style) it works as I'd expect, but if I use it in a method of a class in an Android Studio project found is never set. The "Strings" I am feeding the for loops just happen to be integers anyway so I can do :

for (String itemOfMyNumbers : arrayOfInputLine) {

    for (int itemOfLatestNumbersArray = 2; itemOfLatestNumbersArray < 7; itemOfLatestNumbersArray++) {

        if (Integer.parseInt(latestNumbersArray[itemOfLatestNumbersArray]) == Integer.parseInt(itemOfMyNumbers)) {

              found = 1;
          }

     }
}

That makes it now work.

Why can I compare String types with a simple == on the command line but not within an Android Studio project?