Get return value from new class with gui

I have a class that extends JFrame to make orders. in the middle I have a button that opens a new window that is used to find an article.

What I need is: When I click btnNewArticle, after searching new article, and confirm in new window, I will get as return article code.

Click btnNewArticle --> (open new window to find an article) --> 开发者_Python百科confirm selection -->as return I get Article Code.

Is it possible?

Thanks

Have a look at Java dialogs: How to Make Dialogs.

In the above tutorial, they explain how to do custom dialogs such as the one below:

They handle return-values by giving the child-dialog a reference to it's parent dialog, in which it fills in the relevant values upon closing.

For me this principle has worked:

public class ArticleSearchDialog extends JDialog {

    public static ArticleId execute(Frame parent) {
        ArticleSearchDialog dialog = new ArticleSearchDialog(parent, true);
        dialog.setVisible(true);
        return dialog.getSelectedArticle();
    }

    private ArticleId getSelectedArticle() {
        return selectedArticle;
    }

    private void jbCancelActionPerformed(ActionEvent evt) {
        selectedArticle = null;
        setVisible(false);
        dispose();
    }

    private void jbOkActionPerformed(ActionEvent evt) {
        selectedArticle = ...; //TODO 
        setVisible(false);
        dispose();
    }        

    // All the rest of the dialog code.
}

Then the call gets really easy:

ArticleId articleId = ArticleSearchDialog.execute(this);
if (articleId != null) {
    //TODO
}