// Counter1

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

class Counter1 extends JFrame implements ActionListener {   
  private int count;
  private Container c;
  private JButton b;
  private JLabel l;
  
  public static void main(String[] args) {
    Counter1 c = new Counter1();
    c.setVisible(true); 
    // why write setVisible and pack last? they "realize" the frame...see
    // http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html
  }
  
  public Counter1() {
    setGUI();
    setLayout();
    registerListeners();
  }
  
  private void setGUI() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(200,100); 
  }
  
  private void setLayout() {
    c = getContentPane();
    c.setLayout(new FlowLayout(FlowLayout.LEFT));
    b = new JButton("Push Me!");
    c.add(b);
    l = new JLabel(generateLabel());
    c.add(l);
  }
  
  private void registerListeners() { 
    b.addActionListener(this);
  }
  
  public void actionPerformed(ActionEvent e) {
    count++;
    l.setText(generateLabel());
  }
  
  private String generateLabel() {
    return "Count: "+count;
  }   
}