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

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class MyApp extends JFrame {
	private JLabel lab;
	private JTextField tf;
	private JButton but;
	private JComboBox<String> combo;
	private JButton but2;

	public MyApp() {
		setSize(800, 600);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setTitle("Mon application");

		JPanel panel = new JPanel(new BorderLayout());
		setContentPane(panel);

		JPanel top = new JPanel(new GridLayout(1,5));
		panel.add(top,BorderLayout.NORTH);

		lab = new JLabel("Input something:");
		tf = new JTextField();
		but = new JButton("OK");
		but2 = new JButton("ZZZZ");

		combo = new JComboBox<>(new String[]{"Blue","Green","Yellow"});
		top.add(lab);
		top.add(tf);
		top.add(but);
		top.add(but2);
		top.add(combo);

		but.addActionListener(this::doOK);
		but2.addActionListener(this::showOpts);
		combo.addActionListener(this::comboChanged);

	}

	public void showOpts(ActionEvent e) {
		String fav = (String) JOptionPane.showInputDialog(this,
		        "What is your favorite pet?",
		        "Favorite pet",
		        JOptionPane.QUESTION_MESSAGE,
		        null,
		        new String[]{"Dog","Cat","Fish"},
		        "Dog");

	}
	public void comboChanged(ActionEvent e) {
		tf.setText((String)combo.getSelectedItem());

	}
	public void doOK(ActionEvent e) {
		String txt = JOptionPane.showInputDialog("Entrez du texte");
		lab.setText(txt);
	}


	public static void main(String[] args) {
		MyApp f =new MyApp();
		f.setVisible(true);
	}

}