Question

I have an action button that is supposed to check the expire date for the application during login:

public void actionPerformed(ActionEvent ae) {
  Calendar expiredate = Calendar.getInstance();
  expiredate.set(2012, 10, 10);
  if (ae.getSource() == button) {
    char[] temp_pwd = t_pass.getPassword();
    String pwd = null;
    pwd = String.copyValueOf(temp_pwd);

    if (db.checkLogin(t_name.getText(), pwd)) {
      try {
        if (Calendar.getInstance().after(expiredate)) {
          JOptionPane.showMessageDialog(null, "License has Expired\n Please Re-new the License from the Provider", "Re-new License", JOptionPane.ERROR_MESSAGE);
          t_name.setText("");
          t_pass.setText("");
          t_name.requestFocus();
          return;
        }
        JOptionPane.showMessageDialog(null, "You have logged in successfully. Click OK to Continue", "Success",
        JOptionPane.INFORMATION_MESSAGE);
        MainFrame page = new MainFrame();
        page.setVisible(true);
        setVisible(false);
      } catch(Exception ai){
        JOptionPane.showMessageDialog(null, ai, "Exception",
        JOptionPane.INFORMATION_MESSAGE);
      }
    } else {
      JOptionPane.showMessageDialog(null, "Login failed!\nWrong Username or password", "Failed!!",
      JOptionPane.ERROR_MESSAGE);
      t_name.setText("");
      t_pass.setText("");
      t_name.requestFocus();
      return;
    }
  }//if
}//method

The problem is that the system date is 17th October 2012. Apparently the login still happens. But when I change the 2012 to 2011 as the Expire date, the license validation happens. What could be the issue that the system is ignoring the 10th October 2012 date?

Answer 1

Month constant 10 is for November. NOVEMBER = 10 so you are setting month as November.

You should use

expiredate.set(2012, Calendar.OCTOBER, 10);

Always use month constants provided in Calendar for such usage because month starts from 0 in java. So it avoids confusion.