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Posez votre questionpublic class Bean extends JApplet implements Serializable { private boolean on; private int level; //Getters/Setters public boolean getOn() { return on; } public void setOn(boolean on2) { on = on2; } public int getLevel() { return level; } public void setLevel(int level2) { level = level2; } //Listener JButton bouton = new JButton("bouton"); ActionListener al = new ActionListener() { public void actionPerformed(ActionEvent e) { Bean b = new Bean(); b.setLevel(5); } }; public void init() { Container c = getContentPane(); c.setLayout(new BorderLayout()); c.add(bouton); bouton.addActionListener(al); } }