non static variable cannot be referenced...error.. on a timetable

Hey Guys, I have written a program which will search through
information (a bus timetable) and return whether a journey is
available. i have a problem on the three last paragraphs which should
allow users to enter time, etc.. the error i get on all three is non
static variable 'buses' cannot be referenced from a static context...

HERE is the Code:non static variable cannot be referenced

import java.io.*;
import java.util.*;

class EasyInSlightlyImproved {
    static InputStreamReader is = new InputStreamReader( System.in );
    static BufferedReader br = new BufferedReader( is );
    StringTokenizer st;

    StringTokenizer getToken() throws IOException {
    String s = br.readLine();
       return new StringTokenizer(s);
    }

   String[] buses = { "Cardiff,9.25,Thornhill,9.50", "Cardiff,
9.55,Newport,10.20", "Thornhill,10.00,Llanishan,10.25"};

    float readFloat() {
       try {
         st = getToken();
         return new Float(st.nextToken()).floatValue();
       } catch (Exception e) {
          System.err.println("Exception in EasyIn.readFloat");
          return 0.0F;
       }
    }

    String readString() {
       try {
         return br.readLine();
       } catch (IOException ioe) {
          System.err.println("IO Exception in EasyIn.readString");
          return "";
       }

    }

        public static void main(String args[]) {
        EasyInSlightlyImproved easy = new EasyInSlightlyImproved();

    System.out.print("enter time of bus: ");
    System.out.flush();
    float time = easy.readFloat();
    System.out.println("You entered: " + time);
    for(String s : buses){
        String[] row = s.split(",");
        if (Float.valueOf(row[1]).compareTo(time)==0){
        System.out.println("Fount time in Schedule");
        }
        }

    System.out.print("enter point of departure: ");
    System.out.flush();
    String departure = easy.readString();
    System.out.println("you entered: " + departure);
    for (String s : buses){
        String[] row = s.split(",");
        if (row[0].compareToIgnoreCase(departure)==0);{
        System.out.println("found departure in schedule");
    }

    }

    System.out.print("enter destination: ");
    System.out.flush();
    String destination = easy.readString();
    System.out.println("you entered: " + destination);
    for (String s : buses) {
    String[] row = s.split(",");
    if (row[0].compareToIgnoreCase(destination)==0){
        System.out.println("found destination in schedule");
    }
    }

       }
}

Any Pointers Would Be Great - Cheers, I appreciate your time.
Paddy