Help with vector and textarea

[Antonioj1015]

I have a code in which i have a textarea, like a notepad it has a menu bar which has save, open, close, select, copy, and paste, ok so i put a sentence, like:
Hello, how are you?
i need to make a vector that captures every letter, like:
V[H], V[e], V[l]...
how do i do this? i am trying to make a cryptography program, in which every letter type gets replaced by a number, but in the part of separating the textarea into letters i get stuck...i would really apreciate if you could help me thankssss...

JTextArea Text = new JTextArea();

[r035198x]

Just split the String into an array of characters using the string.toCharArray method.

[Antonioj1015]

Just split the String into an array of characters using the string.toCharArray method.

yea i know but then how could i replace each letter with a number...