// converts from codes.txt to states.txt public class Codes { public static void main(String[] args) { int N = 57; In in = new In("codes.txt"); in.readLine(); while (!in.isEmpty()) { String line = in.readLine(); String[] fields = line.split("\\t+"); String state = fields[0]; String usps = fields[1]; String fips = fields[2]; if (fips.startsWith("0")) fips = fips.replaceAll("0", ""); if (state != null) { System.out.println(state + "," + usps + "," + fips); } } } }