time decrementer from serviceTime()

Back to this grocery line queue program,

I have created in the Customer class a getServiceTime() which creates a random number between 1 and 5, in the main class the service time is decremented until 0, once it is 0, the customer is removed from the queue, but the problem is I am getting this at runtime.

New customer has been added!, New queue length is now 1

Customer serviced and removed from queue. New queue length is now 0

New customer has been added!, New queue length is now 1

Customer serviced and removed from queue. New queue length is now 0

New customer has been added!, New queue length is now 1

Customer serviced and removed from queue. New queue length is now 0

New customer has been added!, New queue length is now 1

Customer serviced and removed from queue. New queue length is now 0

New customer has been added!, New queue length is now 1

Customer serviced and removed from queue. New queue length is now 0

New customer has been added!, New queue length is now 1
code pasted below:

import java.util.Random;

public class Customer {
     private int serviceTime;
     
    public Customer(){  
         
    }
    public int getServiceTime(){  
        Random time = new Random();
         serviceTime = time.nextInt(5) + 1;
        return serviceTime;
    }
}
    

main class

import java.util.LinkedList;
import java.util.Queue;
import java.util.Random;

public class GroceryStoreQueue {
    
    public static void main(String[] args) {
      int newCust;
        int serviceTime = 0;
        int totalCust = 0;
        int maxQ = 0;
       
        
         Queue<Customer>custQ = new LinkedList<Customer>();
         
        
         for(int i = 60; i >= 0; i--){//60  minutes of activity  
             
         Random r = new Random();
         newCust = r.nextInt(4) + 1;//25% random number will be 1, if random number equals 1, add cust to q
         
        Customer cust = new Customer(); 
        cust.getServiceTime();
        serviceTime--;
       
         
         
         if(newCust == 1){             
              custQ.add(cust);//if customer has been added to line, add cust to q  
              custQ.size();
              
              if(maxQ < custQ.size()){
                  maxQ = custQ.size();
              }
              System.out.println("\nNew customer has been added!, New queue length is now " + custQ.size());
              totalCust += newCust;
              
              
             if(serviceTime <= 0){             
              
             custQ.remove(cust);
                  System.out.println("\nCustomer serviced and removed from queue.  New queue length is  now " + custQ.size());
        }    
      }
    }  
          for(int i = 1; i<= 60; i++){
          System.out.print("-");//shows the elapsed time 
         }
        System.out.println("\nTotal number of customers serviced: " + totalCust);
         System.out.println("Maximum line length during the simulation: " + maxQ); 
    }   
  }