Outputting a string alternating uppercase and lowercase without using the Character class

Question

            for (int i = 0, len = input.length(); i < len; i++) {
                char ch = input.charAt(i);
                if (i % 2 == 0) {
                    System.out.print(Character.toLowerCase(ch));
                } else {
                    System.out.print(Character.toUpperCase(ch));

                }
            }

I want to do this without using the character class. Only using tolowerCase and toUpperCase and basic loops.

So, the basic program would be converting a string like "Hello World" to "HeLlo WoRlD" without using the character class.

I'm told you can do it, but I can't figure it out. It's really bugging me

Take a look at an ASCII table – Jonny Henly Mar 01 '17 at 00:45 — Jonny Henly, Mar 01 '17 at 00:45
You can use substrings as well – Lavaman65 Mar 01 '17 at 00:46 — Lavaman65, Mar 01 '17 at 00:46

score 0 · Answer 1 · answered Mar 01 '17 at 01:42

I figured it out. It would just be this:

            for (int i = 0, len = input.length(); i < len; i++) {

                char ch = input.charAt(i);
                String str = ch + ""; //<- converts char to a string!

                if (i % 2 == 0) {
                    System.out.print(str.toLowerCase());
                } else {
                    System.out.print(str.toUpperCase());

Not sure why this got downvoted so much, I spent like an hour on google looking for something like this. I guess I suck at google.

Outputting a string alternating uppercase and lowercase without using the Character class

1 Answers1