How to make "Enter" Key Behave like Submit on a JFrame

Question

I'm Building a Client/Server application. and I want to to make it easy for the user at the Authentication Frame.

I want to know how to make enter-key submits the login and password to the Database (Fires the Action) ?

Answer 1

One convenient approach relies on setDefaultButton(), shown in this example and mentioned in How to Use Key Bindings.

JFrame f = new JFrame("Example");
Action accept = new AbstractAction("Accept") {

    @Override
    public void actionPerformed(ActionEvent e) {
        // handle accept
    }
};
private JButton b = new JButton(accept);
...
f.getRootPane().setDefaultButton(b);