/Java/How to check that letter is not a number and is repeating or not in a sentence in java

How to check that letter is not a number and is repeating or not in a sentence in java

private static boolean check(String input) {
    for (int i = 0; i < input.length(); i++) {
        char ch = input.charAt(i);
        if (Character.isLetter(ch) && input.indexOf(ch, i + 1) != -1) {
            return true;
        }
    }
    return false;
}

Source: stackoverflow.com

Similar codes

10 votes210 views4 answers
Java sort 2d array
Java
12 votes227 views3 answers
Hash map java
Java
-1 vote226 views1 answer
Taglib in jsp
Java
0 vote225 views2 answers
How to pass string between activities android
Java
0 vote225 views1 answer
Java vererbung methoden
Java
5 votes180 views4 answers
Cors spring boot
Java
0 vote225 views1 answer
Java print method
Java
0 vote219 views1 answer
Findng and replacing duplicate values in an array
Java
0 vote212 views1 answer
Unparseable date android
Java
0 vote202 views1 answer
Get sum of int array and return string
Java