有CheckBoxMenuItems和ButtonGroup。当我为当前CheckBoxMenuItem设置侦听器时,将检查该条件并在此侦听器中生成错误。我有另一个CheckBoxMenuItem,它对我来说没有必要,即使我会写“返回”。 问题是该方法不能抛出异常而且该类是匿名的。 这是代码:
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);
}
});
匿名类中有方法(аctionPerformed)。我希望条件取消切换元素的ChechBoxItem,即停止此操作。但是,无论如何,方法ÂctionPerformed完成后,会自动切换复选框,因为它会被通知View。我需要在方法actionPerformed
中直接阻止它答案 0 :(得分:1)
您应该致电MainActivity.this.mAdminMode.setSelected(true);
,而不是setEnabled(true)
。