Finding all uppercase letters of a string in java

Question

So I\'m trying to find all the uppercase letters in a string put in by the user but I keep getting this runtime error:

Exception in thread \"main\" java.lan         


        

Answer 1

The array index out of bounds is due to the for loop not terminating on length - 1, it is terminating on length Most iterating for loops should be in the form:

for (int i = 0; i < array.length; i++) {
    // access array[i];
}

It's the same with a string.

Perhaps a cleaner way would be:

String inputString; // get user input

String outputString = "";

for (int i = 0; i < inputString.length; i++) {
    c = inputString.charAt(i);
    outputString += Character.isUpperCase(c) ? c + " " : ""; 
}
System.out.println(outputString);

Edit: Forgot String Doesn't implement Iterable, silly Java.