How to capitalize the first letter of word in a string using Java?

Question

Example strings

one thousand only
two hundred
twenty
seven

How do I change the first character of a string in capital letter and not change

Answer 1

Simplest way is to use org.apache.commons.lang.StringUtils class

StringUtils.capitalize(Str);

Answer 2

You can try the following code:

public string capitalize(str) {
    String[] array = str.split(" ");
    String newStr;
    for(int i = 0; i < array.length; i++) {
        newStr += array[i].substring(0,1).toUpperCase() + array[i].substring(1) + " ";
    }
    return newStr.trim();
}

Answer 3

Update July 2019

Currently, the most up-to-date library function for doing this is contained in org.apache.commons.lang3.StringUtils

import org.apache.commons.lang3.StringUtils;

StringUtils.capitalize(myString);

If you're using Maven, import the dependency in your pom.xml:

<dependency>
  <groupId>org.apache.commons</groupId>
  <artifactId>commons-lang3</artifactId>
  <version>3.9</version>
</dependency>

Answer 4

public static String capitalize(String str){
        String[] inputWords = str.split(" ");
        String outputWords = "";
        for (String word : inputWords){
            if (!word.isEmpty()){
                outputWords = outputWords + " "+StringUtils.capitalize(word);
            }
        }
        return outputWords;
    }

Answer 5

Use this:

char[] chars = {Character.toUpperCase(A.charAt(0)), 
Character.toUpperCase(B.charAt(0))};
String a1 = chars[0] + A.substring(1);
String b1 = chars[1] + B.substring(1);

Answer 6

StringUtils.capitalize(str)

from apache commons-lang.