CheckBoxMenuItem和ButtonGroup

Question

这里有CheckBoxMenuItems ButtonGroupи。当我为当前CheckBoxMenuItem设置侦听器时，检查条件并在此侦听器中产生错误。我已经激活了另一个CheckBoxMenuItem，这对我来说不是必须的，即使我会写"return“。问题是该方法不能抛出异常，并且类是匿名的。代码如下：

mUserMode.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {

                if(currentCard == 0) {
                    return;
                }

                boolean IsEmptyFields = true, isCheckedAnswers = false;

                // check if all fields is fill in ...
                endOfCycle: for(Component component: panelForAddingQuesions.getComponents()) {
                    if(component instanceof JTextField) {
                        JTextField question = (JTextField)component;
                        if(question.getText().length() == 0) {
                            IsEmptyFields = false;
                            break endOfCycle;
                        }

                    }
                }

                // and if there is one correct answer in every question
                // check if all fields is fill in ...
                for(Entry<JTextField, ArrayList<JCheckBox>> entrySets: equivalenceOfQuestionFiledsAndItsAnswers.entrySet()) {
                    isCheckedAnswers = false;
                    for(JCheckBox checkbox: entrySets.getValue()) {
                        if(checkbox.isSelected()) {
                            isCheckedAnswers = true;
                        }
                    }

                }

                if(IsEmptyFields) {
                    JOptionPane.showMessageDialog(MainActivity.this, 
                            "Error", "Error",
                            JOptionPane.ERROR_MESSAGE);
                }
                else if(isCheckedAnswers) {
                    JOptionPane.showMessageDialog(MainActivity.this, 
                            "Error","Error",
                            JOptionPane.ERROR_MESSAGE);
                }
                else {
                    cardLayout.last(cardPanel);
                    currentCard = 0;
                }

// It doesn't help
                //MainActivity.this.mAdminMode.setEnabled(true);
            }
        });

匿名类中有一个方法(аctionPerformed)。我想在一个条件下取消元素的切换ChechBoxItem，即停止这个操作。但是，无论如何，当方法View ctionPerformed完成时，将会自动切换复选框，因为它将被通知а。并且我需要在actionPerformed方法中直接防止它

Answer 1

你应该调用MainActivity.this.mAdminMode.setSelected(true);，而不是setEnabled(true)。