Contor3.java

package ro.virtualcampus.ev;

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class Contor3 extends JFrame {

    private static final long serialVersionUID = 1L;
    JButton buton;
    JLabel eticheta;
    static int contor = 0;

    public Contor3() {
        super("Contor");
        setLocation(100, 100);
        setLayout(new GridLayout(2, 1));
        buton = new JButton("Apasa!");
        eticheta = new JLabel("", JLabel.CENTER);
        getContentPane().add(buton);
        getContentPane().add(eticheta);
        buton.addActionListener(new ButtonListener());
    }

    class ButtonListener implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            if (e.getActionCommand().equals("Apasa!")) {
                contor++;
                eticheta.setText(contor + "");
            }
        }

    }

    public static void main(String args[]) {
        Contor3 app = new Contor3();
        app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        app.pack();
        app.setVisible(true);
    }

}