Creating java objects

Question

import java.io.*;
import java.util.*;
class SalesRep{
     private String id;
     private int areaCode;
     private double commission;
     private double sales;
     SalesRep(String i, int a, double c, double s){
          id = i;
          areaCode = a;
          commission = c;
          sales = s;
     }//end construtor
class Q3{
     public static void main(String[] arg)throws IOException{
          Scanner in = new Scanner(new FileReader("salesrep.dat"));
          SalesRep []s = new SalesRep[100];
          String line = in.nextLine();
          int count = 0;
          while(!(line.equals("xxxx"))){
               s[count]= new SalesRep(in.next(), in.nextInt(), in.nextDouble(), in.nextDouble());
               count++;
               line = in.nextLine();
          }//end while
     }//main
}//classI am trying to read the text file below, I know what the problem is but I cant figure how to solve it.
d5456654 4 0.5 600 567 456 345 789 890 678 456 345 890 567 456
r4564656 6 0.04 789 789 567 789 467 890 567 789 456 678 456 890
t6786889 2 0.01 567 345 678 345 678 890 567 345 678 789 456 789
xxxx
The problem is I have to read in the 12 sales figures for each month of the year. Do I declare an array in the SalesRep class?
When I am reading, from the file how do I separate the other variables from the 12 sales figures so that I can read them into the file?

Answer 1

public static void main(String[] Args){
          // create a 300-element array and a 300-element list
          int[] arr = new int[300];
          java.util.ArrayList<Integer> arr2 = new java.util.ArrayList<Integer>(300);
          for(int i=0; i<300; i++){
               arr2.add(0);
          // get each value in the array
          long t0 = System.nanoTime();
          for(int i=0; i<300; i++){
               int x = arr;
          long t1 = System.nanoTime();
          // get each value in the list
          long t2 = System.nanoTime();
          for(int i=0; i<300; i++){
               int x = arr2.get(i);
          long t3 = System.nanoTime();
          // print the times
          System.out.println("d0: " + (t1-t0) + "; d1: " + (t3-t2));
     }Results:
d0: 12561; d1: 52240
d0: 12840; d1: 51520
d0: 12760; d1: 51600
d0: 12200; d1: 52600
d0: 12240; d1: 52241
The ArrayList is about 4x slower in these cases. I switched the test order (list first, array second) and got the same results.