用另一个类的构造函数填充字符串数组

Question

I am new to programming in Java. We are assigned to create a MovieSeating class which is a 2D array. I am stuck on a part where I need to fill each "space" with the information of a customer from a class called Customer I have in another Java file.

 public Customer()//constructor
 {
      lastName = "???";
      firstName = "???";
      customerID = 0;
      matineeTickets = 0;
      normalTickets = 0;
      totalCost = 0.0;
  }

I am not sure how to take this info with multiple types and fill it into my 2d array.

Code I currently have, but stuck where to go from here. Keep getting errors for everything I try.

public class MovieSeating
{
//instance variables
private String [][] seating; //declare array


//create constructor to create Movie Seating array
public MovieSeating(int rowNum, int columnNum)
{

    seating = new String [rowNum][columnNum];

    //for loop to crate an initial customer elember for each part of 

    for (int r = 0; r<rowNum;r++)
    {
        for (int c = 0; c < columnNum; c++)
        {
            seating [r][c]= //????????????   
        }
    }
}

Appreciate any insight to set me on the correct path.

Answer 1

You can just declare your array like this:

Customer[][] seating;

And initialize it like this:

seating = new Customer[rowNum][columnNum];

Now you can just assign a new customer to each "space" in the array:

Customer cust = new Customer();
// set fields of cust here...
seating[r][c] = cust;

I also recommend you to add a toString method in the Customer class. This way, you can still use a String[][] instead of a Customer[][] :

@Override
public String toString() {
    // this is just an example, you can add more to the string.
    return "Last Name = " + lastName + ", First Name = " + firstName + ", Customer ID = " + customerID;
}

Now to assign a Customer to a String[][] , just call toString :

seating[r][c] = cust.toString();