swing中作下拉框

Question

swing页面中第一个下拉框输入要个第二个级联怎么做

Answer 1

private JComboBox  areacmb = new JComboBox();//
private JComboBox  childareacmb = new JComboBox();//
areacmb.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent arg0) {
            // TODO Auto-generated method stub
                int index = areacmb.getSelectedIndex();
                initialchildareaComBox(index);//往childareacmb里塞item
            }
           });