How do I search through the array book and check if the title or isbn matches with the user input?

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Java

When I run my code to verify if the title or isbn of the book matches with what the user enters, it tells me "cannot invoke get__() on the array type Book []

What I have tried:

//This method will search the books array for a given book
//If the book is found by title or isbn, and the quantity > 0, and it's for sale, it returns the array index of the book
//   otherwise, it returns a -1
public static int searchByTitleOrISBN(Book[] b)
{
    int i = 0;
    //   print a message "Enter the Title or ISBN of the book: "
    System.out.println("Enter the Title or ISBN of the book: ");
    String input = scan.next();


    //   use a while loop to search through the array books using a counter and as long as no match is found
    while (i < b.length) {
    //      if there's a match for the title or a match for the isbn and the book quantity > 0 and the book is for sale
        if ((b.getTitle().equals(title) || b.getISBN().equals(isbn)) & b.getQty() > 0 && b.isForSale()) {
    //         print a message "We have that book in stock and it is available for purchase!!"
            System.out.println("We have that book in stock and it is available for purchase!!");
    //         print column headers "     Title                    ISBN          Quantity       Price          For Sale"
        System.out.println("     Title                    ISBN          Quantity       Price          For Sale");
    //         print the information for the book (call method toString())
        System.out.println(b[i].toString());
    //         indicate a match was found
    }
    //      otherwise,
    else
    //         increase counter i
        i++;
    //      if a match was found,
        if (b.getTitle().equals(title) || b.getISBN().equals(isbn))
    //         return the array index of the book
            return i;
    //      otherwise,
     else {
    //         print a message "Sorry, we do not have that book in stock or it not for sale."
    System.out.println("Sorry, we do not have that book in stock or it not for sale."); }
    }
    //      return -1 (code for book not found, or not in stock, or not for sale)
    return -1;
    }