cannot find symbol

[Jeff Allison]

This is sort of GUI-related, but I think it's really a basic Java question so I'm posting here. I've got the following code that is trying to create a simple numeric entry box:

  
        antdFormat = NumberFormat.getIntegerInstance();
        antdField = new JFormattedTextField(antdFormat);
        antdField.setColumns(6);
        antdField.addPropertyChangeListener("value", this);
        

When I go to compile this, I get the following error from the Java compiler:

com\FEIZyfer\Comm2Mon\Main.java:793: cannot find symbol
symbol : method addPropertyChangeListener(java.lang.String,com.FEIZyfer.comm2mon.controlPanelPane)
location: class javax.swing.JFormattedTextField
antdField.addPropertyChangeListener("value", this);

It seems that the compiler doesn't know what addPropertyChangeListener is. But this is right out of the example on (Sun's site. I checked all my import statements and they look OK. Thoughts?

[Michael Dunn]

FormattedTextFieldDemo.java compiles OK for me, but if I comment out this line

//import java.beans.PropertyChangeListener;

your error message is reproduced

[Jeff Allison]

FormattedTextFieldDemo.java compiles OK for me, but if I comment out this line

//import java.beans.PropertyChangeListener;

your error message is reproduced

Thanks for the reply, Michael. I have java.beans.PropertyChangeListener imported (amongst other things):

  
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;

The Sun example (FormattedTextFieldDemo.java) compiles for me as well, so there's something different in the files. But I can't tell what.

[Joel McNary]

Make sure that your class implements PropertyChangeListener -- without seeing your class in its entirity, I think that this is the most likely cause of the error.

[Jeff Allison]

Make sure that your class implements PropertyChangeListener

Thanks Joel. That was it. I had forgotten to add that to the class definition.