Help needed badly for selection sort

Question

I posted this on the other forum but haven't gotten a reply. I have a class that compares the zip codes of a file that is read into the code and store as objects. Now I have to sort the information by the zip codes this is what I have so far and I do not know what I am doing wrong with the selection sort. This is the first time I am doing selection sort.
Here is my .txt
10
Dillin Jake York PA 17409
Valdir John Chicago IL 98098
Morphy Bob Harrisburg PA 73829
Spears Johnathan Chicago IL 09182
Simpson Bloo Los Angeles CA 94840
Griffin Taylor York IL 49283
Cartmen Eric Philadelphia PA 28192
Connaly Teds Springfield IL 12930
Marsh Stan Miami FL 48392
William Thomas Reno NV 39029
and this is the code:
import java.util.*;
import java.io.*;
import java.util.Scanner.*;
public class TestCustomer6 {
  public static void main (String[] args) throws FileNotFoundException {
    Scanner scan = new Scanner (new File ("customerData.txt"));
    int numLines = scan.nextInt();
       Customer2[] customer;
     customer = new Customer2[40];
    for (int i = 0; i < numLines; i++) {
      String fName = scan.next();
      String lName = scan.next();
      String city = scan.next();
      String state = scan.next();
      int zip= scan.nextInt();
     Customer2 newObj = new Customer2(fName,lName,city,state,zip);
    customer=newObj;
public static void selectionSort(int[] array)
{int count;
   for (count = 0; count < array.length; count++)
      int indexOfMin = findMinimum (array, count);
       swap (array, count, indexOfMin );
     public static int findMinimum (int[] array, int startIndex)
{int mycount;
     int indexOfMin = startIndex;
       for(mycount = startIndex + 1; mycount < array.length; mycount++)
          if (array[mycount] < array[indexOfMin]
indexOfMin = mycount;
return indexOfMin;
     public static void swap (int[] array, int preIndex, int nexIndex)
double temp = array[preIndex];
array[nexIndex] = array[preIndex];
array[nexIndex] = temp;
the class:
import javax.swing.*;
class Customer2{
    public static final int FNAME = 0;
    public static final int ZIP = 1;
    private static final int LESS = -1;
    private static final int EQUAL = 0;
    private static final int MORE  = 1;
    private static int compareAttribute;
     private String firstName;
     private String lastName;
     private String city;
     private String state;
     private int zip;
    static {
       compareAttribute = FNAME;
     public Customer2(){
     firstName = " ";
     lastName = " ";
     city = " ";
     state = " ";
     zip = 0;
     public Customer2(String f, String l, String c, String s, int z){
          this.firstName = f;
          this.lastName = l;
          this.city = c;
          this.state = s;
          this.zip = z;
          System.out.println(this.toString());
    public static void setCompareAttribute( int attribute ) {
        compareAttribute = attribute;
    public int compareTo( Customer customer, int attribute ) {
        int comparisonResult;
        if ( attribute == ZIP ) {
            int p2zip = customer.getZip( );
            if (this.zip < p2zip) {
                comparisonResult = LESS;
            } else if (this.zip == p2zip) {
                comparisonResult = EQUAL;
            } else {
                assert this.zip > p2zip;
                comparisonResult = MORE;
        } else { //compare the name using the String class�s
                //compareTo method
            String    p2fname = customer.getFirst( );
            comparisonResult = this.firstName.compareTo(p2fname);
        return comparisonResult;
    public int compareTo( Customer customer ) {
        return compareTo(customer, compareAttribute);
     public String getFirst(){
          return firstName;
     public String getLast(){
          return lastName;
     public String getCity(){
          return city;
     public String getState(){
          return state;
     public int getZip(){
          return zip;
     public String toString(){
          return  getFirst() + ",  " + getLast() + "     " + getCity() + "     "
          + getState() + "     " + getZip();

Answer 1

1) Your code doesn't compile;
2) You don't call your selection sort method anywhere;
3) Your selection sort attempts to sort an int array which doesn't make sense;
4) You don't use the comparison methods defined in your Customer2 class;
5) I think that you've just copied/pasted several code fragments;
6) Your indentation style is highly inconsistent (also see 5).
kind regards,
Jos