JAVA help (not trolling) (pls)

I'm trying to read in a list of strings of characters A, C, G,and T (ignoring case), and to ignore the rest of the string if it contains any other character.

how do I code this? do I use indexOf?

V new to Java yes. Not trolling just need help quickly.

>>8
Eh? The op is already starting to get brain damage by being subjected Java. Adding an additional boolean test only hastens the brain damage. Seriously. With that, here is what I came up with...


http://pastebin.com/KFmt7tnV