CODEWITHSUNDEEP
javaswingarraylistjbuttonjtextfield
skibum
skibum

Reputation: 11

Printing an ArrayList to a JTextField via a JButton

I have created a library Class of which has an ArrayList of Books called booklist.

public class Library {
    
    //Fields
    String libraryName;
    ArrayList<Book> booklist;

    //Constructor
    public Library() {
        this.libraryName = "Mt Baker";
    }

    public Library(String libraryName) {
        this.libraryName = libraryName;
        this.booklist = new ArrayList<Book>();

I have created a print method which works great to print the ArrayList to console.

public void printBooks() {
        for (Book s : booklist)
            System.out.println("Title: \t" + s.getTitle() + "\t\tAuthor: " + s.getAuthor() +
            "\tYear: " + s.getYear() + "\tISBN :" + s.getISBN());
    }

I cannot work out how to code the actionPerformed that would allow this method to print the ArrayList into the JTextArea. I have tried various iterations:-

String op = evt.getActionCommand();
            Library x = new Library();
            ArrayList <Book> y = new ArrayList<>();

if (op.equals("Show Library")) {
                GUI.this.libraryResult.setText(y.printBooks().toString());
            }

libraryResult is the JTextField, "Show Library" the JButton Listener Event.

Other advice on this site recommends use of append and toString, but I have not managed to make them work. Any advice much appreciated.

Upvotes: 0

Views: 112

Answers (1)

IntoVoid
IntoVoid

Reputation: 964

GUI.this.yourButton.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        String text = getAsString();
        GUI.this.libraryResult.setText(text);
    }
});

...

// Put this method somewhere else (where there is still access to your booklist)
public String getAsString() {
    StringBuilder sb = new StringBuilder();
    for (Book s : booklist) {
        sb.append("Title: \t" + s.getTitle() + "\t\tAuthor: " + s.getAuthor() + "\tYear: " + s.getYear() + "\tISBN :" + s.getISBN());
    }
    return sb.toString();
}

Upvotes: 1

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