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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
you're trying to use "toUpperCase()" on a char instead of a String. Try
String s1 = ("" + name.charAt(0)).toUpperCase();It changes the char to a String.
I initially tried
String s1 = name.charAt(0).toUppercase());
But it gave me a char cannot be defererenced error. I don't really understand the error unfortunately.