Modify the static return upperCase method in the MyMethods class so that it returns a string of the upper case letters. For example, upperCase("John DeGamma") would return the string "JDG" because those are the sequence of upper case letters in the word.

Complete the following file:

public class MyMethods { public static String upperCase(String s) { ... String upperCaseTail = upperCase(...); char ch = s.charAt(0); if (Character.isUpperCase(ch)) ... else ... } }