//Java 1.8

pressme = new JButton("Change_HTML");
pressme.addActionListener((e)-> writehtmlPanel());
pressme1 = new JButton("Change_Web");
pressme1.addActionListener((e)-> writewebPanel());

//Java 1.7

pressme = new JButton("Change_HTML");
pressme.addActionListener(new ActionListener(){
                              public void actionPerformed(ActionEvent e)
                              { writehtmlPanel(); }
                          }); 
pressme1 = new JButton("Change_Web");
pressme1.addActionListener(new ActionListener(){
                               public void actionPerformed(ActionEvent e)
                               { writewebPanel(); }
                           });