How do I get the index of the item selected from a JComboBox?

问题

This is how I created my JComboBox -

String[] options = {"First", "Second" , "Third"};
JComboBox optionsCombo = new JComboBox(options);

When one of these items is selected, how do i get the index of the item which was selected ? I don't want the item the item that was selected.

回答1:

Use : optionsCombo.getSelectedIndex();

inside actionListener Like this :

 ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        System.out.println("Selected: " + optionsCombo.getSelectedItem());
        System.out.println(", Position: " + optionsCombo.getSelectedIndex());
      }
    };
    optionsCombo.addActionListener(actionListener);

回答2:

int index = optionsCombo.getSelectedIndex() 

will give selected index. Use this in combo box action listener

回答3:

indexes starts from 0,1,2,.. if you want to get the index of selected item then do this

optionsCombo.getSelectedIndex()

来源：https://stackoverflow.com/questions/15760592/how-do-i-get-the-index-of-the-item-selected-from-a-jcombobox