How to check that a JCheckBox is checked?

问题

How can I check if a JCheckBox is checked?

回答1:

Use the isSelected method.

You can also use an ItemListener so you'll be notified when it's checked or unchecked.

回答2:

By using itemStateChanged(ItemListener) you can track selecting and deselecting checkbox (and do whatever you want based on it):

myCheckBox.addItemListener(new ItemListener() {
    @Override
    public void itemStateChanged(ItemEvent e) {
        if(e.getStateChange() == ItemEvent.SELECTED) {//checkbox has been selected
            //do something...
        } else {//checkbox has been deselected
            //do something...
        };
    }
});

Java Swing itemStateChanged docu should help too. By using isSelected() method you can just test if actual is checkbox selected:

if(myCheckBox.isSelected()){_do_something_if_selected_}

来源：https://stackoverflow.com/questions/3599908/how-to-check-that-a-jcheckbox-is-checked