ToUpperCase.java

package strings;

public class ToUpperCase {
    public static String upperCase(String str) {
        StringBuilder sb = new StringBuilder("");

        char ch = Character.toUpperCase(str.charAt(0));
        sb.append(ch);

        for (int i = 1; i < str.length(); i++) {
            if (str.charAt(i) == ' ' && i < str.length() - 1) {
                sb.append(str.charAt(i));
                i++;
                sb.append(Character.toUpperCase(str.charAt(i)));
            } else {
                sb.append(str.charAt(i));
            }
        }

        return sb.toString();
    }

    public static void main(String[] args) {
        String str = "hello, it's Jomon";

        System.out.println(upperCase(str));
    }
}

// For a given String convert the first letter of each world to uppercase.
// "hello, it's Jomon"