trying to call a method but cannot find symbol

[Dustin Schreader]

This may be really easy to figure out but I guess i'm not understanding with the following code

public class CustomerList extends UnorderedLinkedList<Customer>
{

		public CustomerList(){
			super();
		}
 

    private LinkedListNode<Customer> searchCustomerList(String num)
    {
        boolean found = false;   //set found to false
        LinkedListNode<Customer> current = null;

        if (first == null)  //the list is empty
            System.out.println("Cannot search an empty list. ");
        else
        {
            current = first;  //set current to point to first
                              //node in the list
            found = false;    //set found to false

            while (current != null && !found) //search the list
            {

                Customer temp = (Customer) current.info;

                if (temp.checkNum(num)) //item is found
                    found = true;
                else
                     current = current.link; //advance current
                                             //to the next node
            }
        }

        return current;
    }
	
	
		
	public boolean customerSearch(String num)
    {
        LinkedListNode<Customer> location;

        location = searchCustomerList(num);

        return (location != null);
    }

	
    public boolean customerCheckNum(String num)
    {
        LinkedListNode<Customer> location;

        location = searchCustomerList(num); //search the list

        return (location != null);
    }
    
	 public void customerPrintNum()
    {
        LinkedListNode<Customer> current;
        Customer temp;

        current = first;
        while (current != null)
        {
            temp = (Customer) current.info;
            temp.printNum();
            current = current.link;
        }
    }
	

    public void print()
    {
        LinkedListNode<Customer> current; //variable to
                                        //traverse the list
        Customer temp;

        current = first;    //set current so that it points to
                            //the first node
        while (current != null) //while more data to print
        {
            temp = (Customer) current.info;
            temp.printInfo();
            current = current.link;
        }
    }
	 
	 public void printInformation(String num)
	 {
	 		num.printInfo();
	 }
	
	
}

I get an error cannot find symbol in the printInformation method. But the printInfo(); seems to work just fine in the print method second from the bottom.

[Christophe Verré]

You're trying to call a printInfo method on a String variable. Shouldn't this be a Customer ?

[Dustin Schreader]

I want the method to print the customer info given the customer id number. So i'm trying to create a method that will print that info out.
maybe this helps

    
public void printInfo()
    {
        System.out.println("Customer Number: " + customerNum);
        System.out.println("Customer Name: " + customerF + customerL);
        System.out.println();
    }

This method is from my other class: Customer

[Christophe Verré]

Yes, but you didn't get what I'm trying to say

Look at "num.printInfo();". What is "num" ? It's a String. printInfo() is not a method of the String class. Where is that method ? In the Customer class ? Then you have to call it on a customer, not on a String.

[Dustin Schreader]

Ok so I would want to write it like this?

	 public void printInformation(Customer customer)
	 {
	 		customer.printInfo();
	 }

[Christophe Verré]

Yes

[Dustin Schreader]

So now since it's not a string type anymore, how will it be able to print out the correct customer given a customer number (customerNum) string. This is the code from main.

System.out.print("Enter Customer ID: ");
                        customerNum = console.nextLine();
                        System.out.println();

                        if (customerList.customerSearch(customerNum))
                        {
						
							customerList.printInformation();

									 
                        }
                        else
                            System.out.println("There is no Customer" + customerNum);

[Christophe Verré]

customerSearch should return a Customer, instead of returning a boolean. Then you can use the returned value to print the information. If the returned value is null, then the customerId does not exist.

[Dustin Schreader]

So I think I understand the concept. but I still need the original customerSearch method because it is used by another method. So I would make a second customerSearchTwo and have it return Customer.

	public customerSearchTwo<Customer>
    {
   	  <Customer> customerID = customer
			    
		  LinkedListNode<Customer> location;

        location = searchCustomerList(num);
		  
		  customerID = location

        return customerID;
    }