import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class PushCounterPanel extends JPanel
{
 private int count;
 private JButton push1;
 private JButton push2;
 private JLabel label;
 private boolean _clickMeMode = true;

 //contstructor:  sets up the GUI.
 public PushCounterPanel()
 {
   count=0;

   push1=new JButton ("increase");
   push1.addActionListener (new ButtonListener());

   push2=new JButton ("decrease");
   push2.addActionListener (new ButtonListener());

   label=new JLabel ("count: " +count);

   add (push1);
   add (push2);
   add (label);

   setPreferredSize (new Dimension(300, 40));
   setBackground (Color.green);
 }

 //represents a listener for button push (action) events.
 private class ButtonListener implements ActionListener
 {
 
 //updates the couter and label when the button is pushed.
 public void actionPerformed (ActionEvent event)
 {
	 
   Object source = event.getSource();
     if (_clickMeMode == true) {
         push1.setText("count: "+ count++);
         label.setText("count: " + count);
       } else {
         push2.setText("count: "+ count--);
         label.setText("count: " + count);
         _clickMeMode = false;
       }
  }
 }
}