Regular Expression for UpperCase Letters In A String

Question

For the life of me, I can\'t figure out why this regular expression is not working. It should find upper case letters in the given string and give me the count. Any ideas are we

Answer 1

Change the regular expression to [A-Z] which checks all occurrences of capital letters

Please refer the below example which counts number of capital letters in a string using pattern

@Test
public void testCountTheNumberOfUpperCaseCharacters() {
    Pattern ptrn = Pattern.compile("[A-Z]");
    Matcher matcher = ptrn.matcher("ivekKVVV");
    int from = 0;
    int count = 0;
    while(matcher.find(from)) {
        count++;
        from = matcher.start() + 1;
    }
    System.out.println(count);
}

}