How do I detect that a JComboBox is empty?

问题

How do I detect that a JComboBox is empty? Is it something like:

combobox.isEmpty()

回答1:

What's wrong with JComboBox.getItemCount()? If this method returns 0, the component is empty.

回答2:

if(JComboBox.getItemCount() != 0){
  //JComboBox is not empty - do something..  
}

回答3:

I suppose you're looking for getItemCount() method

来源：https://stackoverflow.com/questions/9161659/how-do-i-detect-that-a-jcombobox-is-empty