Question

I have an input panel and want to call a method in another class when the button is pressed but am getting a null pointer exception. Was hoping someone might be able to tell me what I’m doing wrong?

Here is the code causing it:

public void actionPerformed(ActionEvent ae)
    {
        if (ae.getSource() == resultsButton)
        {
            jbTour.processAdditionalResult();
        }

    }


public void processAdditionalResult()
    {
        System.out.println("button pressed");
    }

Answer 1

You need to initialize jbTour: jbTour = new JBTourObject() (or whatever) so that it is not null before the actionPerformed method gets invoked.