CodeEval - Time to eat - Easy

import java.io.*;
import java.util.Arrays;
import java.util.StringTokenizer;

class Time implements Comparable<Time>{
    int hour;
    int minute;
    int second;

    public Time(int hour, int minute, int second) {
        this.hour = hour;
        this.minute = minute;
        this.second = second;
    }

    @Override
    public String toString() {
        return String.format("%02d:%02d:%02d", this.hour, this.minute, this.second);
    }

    @Override
    public int compareTo(Time o) {
         if(this.hour<o.hour){
            return 1;
        }
        if(this.hour>o.hour){
            return -1;
        }
        if(this.minute<o.minute){
            return 1;
        }
        if(this.minute>o.minute){
            return -1;
        }
        if(this.second<o.second){
            return 1;
        }
        return 1;
    }
}

public class Main {
    static String parser(String str){
        StringTokenizer st=new StringTokenizer(str);
        Time[] time=new Time[st.countTokens()];
        int i=0;
        while (st.hasMoreTokens()) {
            StringTokenizer st2=new StringTokenizer(st.nextToken(),":");
            time[i]=new Time(Integer.valueOf(st2.nextToken()),
                    Integer.valueOf(st2.nextToken()),
                    Integer.valueOf(st2.nextToken()));
            i++;
        }
        Arrays.sort(time);
        StringBuilder sb=new StringBuilder();
        for (int j = 0; j < time.length ; j++) {
            if(j > 0){
                sb.append(" ");
            }
            sb.append(time[j].toString());
        }
        sb.append("\n");
        return sb.toString();
    }
   
    public static void main (String[] args) throws IOException {
        File file = new File(args[0]);
        BufferedReader buffer = new BufferedReader(new FileReader(file));
        String line;
        while ((line = buffer.readLine()) != null) {
            line = line.trim();
            System.out.print(parser(line));
        }
    }
}