java task 8

import java.util.Random;

public class ConnectDemo {
    public static void main(String[] args) {
        ConnectionManager connMngr =new ConnectionManager();
        connMngr.createConnection();
        connMngr.createConnection();
        connMngr.createConnection();
        connMngr.createConnection();
      
        for (Connection arr:connMngr.passConnectArr()){
          System.out.println("connection ID: " + arr.toString());          
        }      
    }
}
class Connection{
    private int size;
    private static int counter=0;
    private int id;
    Connection () {
      Random rand = new Random();      
      this.id = rand.nextInt(1000) + 1;
        counter++;      
    }
    Connection (int id) {
  	this.id = id;
        counter++;
    }
    int getId(){
        return this.id;
    }
    static int getCounter(){
        return counter;
    }
    public String toString(){
      return Integer.toString(getId());

    }
    void doSomething(){
        System.out.println("Something happend ");
    }
}
class ConnectionManager {
    private Connection connectArr[]=new Connection[5];      
    private int size=0;
    void createConnection(){
        if (this.size==connectArr.length){    
            System.out.println("all  connections created ");
            return;
        } else 
        {
            connectArr[this.size]=new Connection(this.size + 1);
            this.size++;
        }
    }
    int getSize(){
        return this.size;
    }
    public Connection[] passConnectArr(){
        return (connectArr);
    }
    boolean containsId (int i) { 
        for (Connection n:connectArr) 
            if (n != null && n.getId()==i) {
                return true;
            }    
        return false;
    } 
}