Mouselistener error

Question

I am getting this error
G:\Java\Exam2\Prob01\Prob01.java:63: local variable label is accessed from within inner class; needs to be declared final
                         label.setText("CounterClockwise");
^
1 error
Tool completed with exit code 1
Here is the code
// Quincy Minor
// Exam 2 Prob01
// ITSE 2317
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Prob01
     public static void main(String[] args)
          new Prob01GUI();
     }//end main
}//end class Prob01
class Prob01GUI
     public Prob01GUI()
          JFrame theFrame = new JFrame();
          theFrame.setSize(200, 150);
          theFrame.setTitle("Quincy Minor");
          theFrame.getContentPane().setLayout(new BorderLayout());
          JButton button03 = new JButton("3");
          theFrame.getContentPane().add(button03, BorderLayout.EAST);
          JButton button06 = new JButton("6");
          theFrame.getContentPane().add(button06, BorderLayout.SOUTH);
          JButton button09 = new JButton("9");
          theFrame.getContentPane().add(button09, BorderLayout.WEST);
          JButton button12 = new JButton("12");
          theFrame.getContentPane().add(button12, BorderLayout.NORTH);
          JLabel label = new JLabel(" Clockwise");
          label.setName("label1");
          theFrame.getContentPane().add(label, BorderLayout.CENTER);
          String plaf = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
          try
               UIManager.setLookAndFeel(plaf);
               SwingUtilities.updateComponentTreeUI(theFrame);
          catch(Exception exception)
               System.out.println(exception);
          theFrame.addWindowListener(new WindowAdapter()
               public void windowClosing(WindowEvent event)
                    System.exit(0);
          label.addMouseListener(new MouseAdapter()
               public void mousePressed(MouseEvent mouseevent)
                         label.setText("CounterClockwise");
          theFrame.show();//display frame
     }//end GUI
}//end class Prob01GUII don't understand this error because the variable label changes on mousePressed therefore it cannot be declared final

Answer 1

final JLabel label = new JLabel(" Clockwise");
The variable 'label' always refers to the same label. One of the attributes of the label changes (the text), but the variable always references the same object.
You could also make 'label' an instance variable instead of a local variable also. Just move the declaration outside the method.