Java, 2D String Array Filled from JTextFields

Question

I am creating a commercial software and got stuck in place, where I need to fill an Array with information from multiple JTextBox fields.

I created an Array -

 public String[][] BookAttributes = new String[BookRows][BookLines];

I want to save information added by User from following JTextFields in [BookLines] column for each book, which should auto-increment every time when new book is added to stock.

private JTextField tfBookName;
private JTextField tfBookCost;
private JTextField tfBookYearOfPublication;
private JTextField tfBookPublishingHouse;
private JTextField tfBookISBN;
private JTextField tfBookAuthor;
private JTextField tfBookNrOfPages;

Unfortunately, I cannot find a solution how to put this all together.

Any Help appreciated.

Thank you!

ninja.coder · Accepted Answer · 2017-01-11 21:24:52Z

3

If I understood you correctly then you are looking to save the Book information like Name, Cost etc. to an array.

But, in the above case you are creating a 2-D String Array which looks something like this:

Location (0,0) of array -> "foo"
Location (0,1) of array -> "bar"
...
...

What you actually need is a class say, Book which can hold the information regarding the different attributes. Something like as follows:

public class Book {

    private String bookName;
    private String bookCost;
    private String bookYearOfPublication;
    private String bookPublishingHouse;
    private String bookISBN;
    private String bookAuthor;
    private String bookNrOfPages;

    /* Constructor, Getter, Setters */
    ...
}

Next you can create an array of this class like this:

int bookRows = 100;
Book[] booksInfo = new Book[bookRows];

And simply code a for loop for stroing the different book details as follows:

for(int i = 0; i < bookRows; i++) {
    Book book = new Book();

    book.setBookName(tfBookName);
    ...
    ...

    booksInfo[i] = book;
}

You can further override the toString() method of the Book class if you want to print the different attributes of any book by simply using System.out.println(...).

Here is the code snippet:

@Override
public String toString() {
    return new StringBuilder().append("BookName: ").append(bookName)
                              .append(" | Book Cost: ").append(bookCost).toString();
}

edited Jan 11, 2017 at 21:24

answered Jan 11, 2017 at 21:18

ninja.coder

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8 Comments

ninja.coder Over a year ago

@Helvijs What is the problem that you are facing?

Helvijs Over a year ago

I tried this, but book.setBookName(tfBookName.getText()); brings me an error, that I cannot make a static reference tothe a non-static method from the type Book ! So Eclipse want me to make setBookName method static (which I don't think need to be static, because it's setter). @user2004685

ninja.coder Over a year ago

@Helvijs Are you doing everything inside the main() function?

Helvijs Over a year ago

No. I already checked, I don't have any static variables or methods involved in this process. I created class Book with setters and getters for all attributes needed. And in different class I am using Book class Object to store all this information in it

Helvijs Over a year ago

I found the problem, everything works now. Thank you!

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