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public class MainClass {
public static void main(String[] args) {
String input = null;
try {
String capitalized = capitalize(input);
System.out.println(capitalized);
} catch (NullPointerException e) {
System.out.println(e.toString());
}
}
public static String capitalize(String s) throws NullPointerException {
if (s == null) {
throw new NullPointerException("Your passed a null argument");
}
Character firstChar = s.charAt(0);
String theRest = s.substring(1);
return firstChar.toString().toUpperCase() + theRest;
}
}
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