How to create only capital letters in the beginning of words?

Question

I need to make a method that makes capital letters only at the beginning of words, is something easy maybe but I haven't been able to make it work so far. Cause the use case I have tested it are diff, Cause I don't have only the case where the first character is a string it can be a number or something else.

The result I want :
test => Test
test start now => Test start now.
2test start now => 2test start now
_test => _test
-test => -test

user `str.toUpperCase()` https://stackoverflow.com/questions/3904579/how-to-capitalize-the-first-letter-of-a-string-in-java — The Scientific Method, May 21 '19 at 08:23
Please provide the code you attempted to write and discuss how it's not working. — Ramzah Rehman, May 21 '19 at 08:24
as mentioned, you can use toUpperCase(). forexample, substring the first letter and substring the rest of the word. Make the first letter capital then concatenate the whole thing — Mike_Jr, May 21 '19 at 08:26
Possible duplicate of [How to capitalize the first letter of a String in Java?](https://stackoverflow.com/questions/3904579/how-to-capitalize-the-first-letter-of-a-string-in-java) — SirFartALot, May 21 '19 at 08:33

score 1 · Accepted Answer · answered May 21 '19 at 08:34

Check if the first char is Alphabetic
Change the letter to upper case

    List<String> values = Arrays.asList("test => Test",
            "test start now => Test start now.",
            "2test start now => 2test start now",
            "_test => _test",
            "-test => -test");

    @Test
    public void firstLetterUpperCase() {
        // Iterate the values
        values.stream()
                // Check if the first char is Alphabetic
                .filter(text -> Character.isAlphabetic(text.charAt(0)))
                // Capital first letter and print
                .forEach(text -> System.out.println(text.substring(0, 1).toUpperCase() + text.substring(1)));
    }

Output

Test => Test
Test start now => Test start now.

score 0 · Answer 2 · edited May 21 '19 at 09:08

0

String text = "text";
String capitalize = text.substring(0, 1).toUpperCase() + text.substring(1);

It takes first character, and does toUpperCase(), then add the rest of the string.

If first character is not a letter, toUpperCase() won't change it.

"-".toUpperCase() is "-"
"1".toUpperCase() is "1"
"a".toUpperCase() is "A"
"A".toUpperCase() is "A"

edited May 21 '19 at 09:08

SirFartALot

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answered May 21 '19 at 08:23

Said

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code dump with no explanation is unhelpful. add an explanation how come this works for cases that do not start with letter – Sharon Ben Asher May 21 '19 at 08:25
1

It takes first character, and does toUpperCase(), then add the rest of the string. If first character is not a letter, toUpperCase() won't change it. "-".toUpperCase() is "-" "1".toUpperCase() is "1" "a".toUpperCase() is "A" "A".toUpperCase() is "A" – Said May 21 '19 at 08:31

SirFartALot · Answer 3 · 2019-05-21T08:32:06.253

0

You could also use org.apache.commons.text.WordUtils.capitalize(String str, char... delimiters) Javadoc from apache.commons-text to captalize words.

Against your request, it capitalizes all words in a string/sentence not only the first character.

To uppercase the first character of a String use org.apache.commons.lang3.StringUtils .capitalize(String str) (Javadoc) from the apache.commons-lang package.

edited May 21 '19 at 08:32

answered May 21 '19 at 08:24

SirFartALot

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How to create only capital letters in the beginning of words?

3 Answers3