CODEWITHSUNDEEP
javaevent-handling
Tolga Karahan
Tolga Karahan

Reputation: 69

Ensuring an Item Is Selected

I'm doing practices of a Java book and I came up to an event handling code like below. My question is if itemStateChanged method called when an item is selected from a JComboBox then why we should ensure that an item is selected?

@Override
public void itemStateChanged(ItemEvent event)
{
      if(event.getStateChange()
           == ItemEvent.SELECTED)
           label.setIcon(icons[
           imagesJComboBox.getSelectedIndex()]);
}

Upvotes: 0

Views: 41

Answers (1)

Nikolas
Nikolas

Reputation: 44456

It's a good practice to check if the method supposed to be called on a particular event really matches the correct event.

Since the method is public, it can be used within any other situation or event. The call of the method itself doesn't secure the event maches ItemEvent.SELECTED itself.

Upvotes: 1

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