如何获得从JComboBox中选择的项目的索引？

Question

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.

Answer 1

int index = optionsCombo.getSelectedIndex() 

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

Answer 2

indexs从0,1,2，..开始。如果要获取所选项目的索引，请执行此操作

optionsCombo.getSelectedIndex()

Answer 3

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);