How to create unique objects in class and store

Question

Hi, I have a class that opens a text file and reads in the
lines. each line holds an ip address. i need to create x amount of
objects, and each object is assigned a unique ip address from the file.
and here i am stuck. the class reads in the file, then i think it should create an object for each line read in and assign that object the ip address. i want to store the objects in some sort of array or collection, and i guess each object will need a unique name, but i dont know how many objects until i read in the file and count the number of lines. can anyone give me any pointers as to how i should create/store the objects
many thanx
ness

Answer 1

You could use your own object:
public class Test {
  public class IPNumber {
    public int ip;
    public IPNumber(int ip) {
      this.ip = ip;
  public Test() {
    int numberOfIPs = 5; // this is your number of lines
    IPNumber[] ips = new IPNumber[numberOfIPs];
    for (int i = 0; i < numberOfIPs; i++) ips[i] = new IPNumber(i); // assign ip address from file
  public static void main(String args[]){
    new Test();
}or you could store the ips as strings:
public class Test {
  public Test() {
    final int numberOfIPs = 5; // this is your number of lines
    final java.util.ArrayList al = new java.util.ArrayList(numberOfIPs);
    for (int i = 0; i < numberOfIPs; i++) al.add(""+i); // assign ip address from file   
  public static void main(String args[]){
    new Test();
}p.s Objects don't have names