import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class SwingCounter extends JFrame implements ActionListener{
    private JLabel jlCounter;
    private JTextField jtfCount;
    private JButton jbCount;
    private int count = 0;
    public SwingCounter(){
        jlCounter = new JLabel("Counter");
        jtfCount  = new JTextField("0",10);
        jbCount   = new JButton("Count");
        Container c = getContentPane();
        FlowLayout fl = new FlowLayout();
        c.setLayout(fl);
        c.add(jlCounter);
        c.add(jtfCount);
        c.add(jbCount);
        jbCount.addActionListener(this);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300,100);
        setTitle("Swing Counter");
        setVisible(true);
    }
    public void actionPerformed(ActionEvent e) {
      count++;
      jtfCount.setText(count + "");
   }

}