(7 kyu) Jaden Casing Strings.java

import java.util.Arrays;
import java.util.stream.Collectors;

public class JadenCase {
  public String toJadenCase(String phrase) {
      if (null == phrase || phrase.length() == 0) {
          return null;
      }

      return Arrays.stream(phrase.split(" "))
                   .map(i -> i.substring(0, 1).toUpperCase() + i.substring(1, i.length()))
                   .collect(Collectors.joining(" "));
  }
}