check character is alphanumeric java

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Leia
06 Oct 2018
1 javaCopypublic class CheckCharAlpha {
2    public static void main(String[] args) {
3
4        boolean letterOrDigit = isAlphaNumeric('k');
5        System.out.println(letterOrDigit);
6    }
7
8    public static boolean isAlphaNumeric(char char1) {
9        return (char1 >= 'a' && char1 <= 'z') || (char1 >= 'A' && char1 <= 'Z') || (char1 >= '0' && char1 <= '9');
10    }
11}
12
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