import java.awt.*;
 import java.awt.event.*;
 import javax.swing.*;
 
/****
 * Le programme suspend et reprend
 * un thread de manière non sécurisée
 ***/
 
 public class ThreadEtat extends JFrame implements Runnable
  	{
      // Les Objets a animer
      private static final String[] listObjet =
          { "|", "/", "-", "\", "|", "/", "-", "\" };
 
       private Thread monThread;
       private JTextField mascotte;
 
       public ThreadEtat()
       	{
      mascotte = new JTextField();
      mascotte.setEditable(false);
      mascotte.setFont(new Font("Monospaced", Font.BOLD, 26));
      mascotte.setHorizontalAlignment(JTextField.CENTER);
 
      final JButton susprendre_anim = new JButton("Suspendre");
      final JButton reprendre_anim = new JButton("Reprendre");
      susprendre_anim.addActionListener(new ActionListener() {
 
              public void actionPerformed(ActionEvent e) {
 
                  suspendre();
 
              }
 
          });
 
      reprendre_anim.addActionListener(new ActionListener() {
 
              public void actionPerformed(ActionEvent e) {
 
                  reprendre();
 
              }
 
          });
 
      JPanel pnl = new JPanel();
      pnl.setLayout(new GridLayout(0, 1, 3, 3));
      pnl.add(mascotte);
      pnl.add(susprendre_anim);
      pnl.add(reprendre_anim);
      setLayout(new FlowLayout(FlowLayout.CENTER));
      add(pnl);
      setTitle("Exemple de Thread");
      setSize(320, 200);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setVisible(true);
  }
 
         // Méthode de suspension
       private void suspendre()
  {
 
      if ( monThread != null )
      {
 
          monThread.suspend();
 
      }
 
  }
 
   // Méthode de reprise
 
       private void reprendre()
  {
 
      if ( monThread != null )
      	{
 
          monThread.resume();
 
      }
 
  }
 
       public void run() {
 
      try {
 
          monThread = Thread.currentThread();
          int count = 0;
 
          while ( true )
          	{
 
              mascotte.setText(
 
                  listObjet[ count % listObjet.length ]);
 
              Thread.sleep(200);
 
              count++;
 
          }
 
      } catch ( InterruptedException x ) {
 
      } finally {
 
          monThread = null;
 
      }
 
  }
 
       public static void main(String[] args)
       	{
 
      ThreadEtat obj = new ThreadEtat();
      Thread thr = new Thread(obj);
      thr.start();
  		}
 
   }