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javalowercase

How to change string to lower case?

Trying to make it so that if the user enters any vowel capitalized, it will return true. So, that's where I added the "letter = letter.toLowerCase();" but it's not working still..

    public static boolean isVowel (String letter) {
        letter = letter.toLowerCase();
        if (letter == "a" || letter == "e" || letter == "i" || letter == "o" || letter == "u" ) {
            return true;

        } else {
            return false;
        }
    }
Solution

  • Try using if (letter.equals("a") || and so on.

    == tests the memory references of String variables, not the contents of the references.

    The equals method of the String class tests the contents of the references.