capitalize each word in string java

1//You can user the WordUtils class from apache commons-text library
2WordUtils.capitalize(str) 

1String str = "hello world!";
2
3// capitalize first letter
4String output = str.substring(0, 1).toUpperCase() + str.substring(1);
5
6// print the string
7System.out.println(output);
8// Hello world!
9

1String str = "java";
2String cap = str.substring(0, 1).toUpperCase() + str.substring(1);

1import org.apache.commons.text.WordUtils;
2
3public class WordUtilsCapitalizeFullyExample {
4    public static void main(String[] args) {
5        String result1 = WordUtils.capitalizeFully("how to CAPITALIZE first letter words");
6        System.out.println(result1);
7    }
8}