登录注销系统时间仍然相同

Question

Good day! I have a problem regarding to this system. Everytime I press log out button, time that I log in is there instead of the current time.

 String logout = usernameTF.getText();
            if (logout.contains(name))
            {
                usernameTF.setText("");
                timeouttf.setText(dtf.format(logoutTime));
                sessiontimetf.setText(Integer.toString((int) Duration.between(loginTime, logoutTime).getSeconds()));
                username.clear();
                loginbtn.setEnabled(true);
                resetbtn.setEnabled(true);
            }
            else
            {
                usernameTF.setText("");
                JOptionPane.showMessageDialog(null, "WRONG INFORMATION", "ERROR", JOptionPane.ERROR_MESSAGE);
            }

Please help me with this. I tried other solutions but it didn't work.

This is the origin of the variables logoutTime and loginTime since I made this program with JFrame.

private static final DateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
private static final DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
LocalDateTime loginTime = LocalDateTime.now();
LocalDateTime logoutTime = LocalDateTime.now();

this is the result when I try to log in and out. (please check out the picture)

as you see, I log in at 2019/02/24 13:38:36 but when I log out three minutes later, it's still the same

Answer 1

since you haven't provided the whole code, i can only guess that what

 timeouttf.setText(dtf.format(logoutTime));

this line does is take the stored time in predefined variable and set it as log out time.

If you want to get current time when you press logout then you should reset the value of logoutTime variable with the new time.