import javax.swing.JApplet;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import javax.swing.BorderFactory;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.Color;

class TexteEtFonte extends JPanel implements ActionListener {  
    JTextField saisieTaille = new JTextField(5);
    JTextArea grandeZone = new JTextArea(4, 10);

    TexteEtFonte() {
	JLabel taille = new JLabel("  Taille de la fonte");
	JScrollPane texteAsc;
	JPanel panneauTaille = new JPanel();
	Font fonte;
	int tailleInitiale;

	saisieTaille.setText("20");
	saisieTaille.addActionListener(this);

	panneauTaille.add(taille, BorderLayout.CENTER);
	panneauTaille.add(saisieTaille, BorderLayout.EAST);

	tailleInitiale = Integer.parseInt(saisieTaille.getText());
	fonte = new Font("TimesRoman", Font.PLAIN, tailleInitiale);
	grandeZone.setFont(fonte);

	texteAsc = new JScrollPane(grandeZone);
	setLayout(new BorderLayout(5, 5));
	add(panneauTaille, BorderLayout.NORTH);
	add(texteAsc, BorderLayout.CENTER);

	setBorder(BorderFactory.createLineBorder(Color.BLACK));
  }
    
    public void actionPerformed(ActionEvent evt) {
      int taillePolice;
 
      try {
	  taillePolice = Integer.parseInt(saisieTaille.getText());
	  grandeZone.setFont(new Font("TimesRoman", 
				  Font.PLAIN, taillePolice));
	}
      catch(NumberFormatException exc) {
	  System.err.println("erreur de taille");
      }
      grandeZone.setText(grandeZone.getText());
      }
}

public class EssaiTexteFonte extends JApplet {
   public void init() {
        setContentPane(new TexteEtFonte());
   }
}