Java error: cannot find symbol, and can't figure out why

Question

Error:

error: cannot find symbol

What appears doesn\'t works:

If I write: \"InvoerVakhandler exte

Answer 1

The variable invoervak1 is defined in the boven class and is not visible within InvoerVakHandler. Since InvoerVakHandler is registered exclusively with the invoervak1 component, you can use the source object of your ActionListener to obtain the reference to the JTextField:

JTextField textField = (JTextField) e.getSource();
String invoer = textField.getText();

Typically anonymous ActionListener implementations are used. This makes the intended source clear along with its associated functionality.