Java

right /prog/ i've never used a text board on here, so, here goes. I would like a small hand with some basic java programming. I am using the BlueJ environment.

Given two Strings s1 and s2 already defined as

String s1 = "SESQUIPEDALIANISM";
String s2 = "";

write a sequence of lines of java code that will make String s2 contain (only)
the letters number 3, 10 and 12 from s1
(e.g. if s1 was "piano"
s2 containing letters 1, 3 and 4 would make s2 = "pan").

hmm, i believe what he meant was the he actually wanted to change s2 to contain letters 3, 10 and 12 from s1. Making it SAI? Please correct me if im wrong? IF so, would the charAt work for this? Im not sure.