下拉列表JComboBox

public class Demo extends JFrame {
    public Demo() {
        setBounds(100, 100, 200, 100);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        Container c = getContentPane();
        c.setLayout(new FlowLayout());
//        JComboBox cbb=new JComboBox();
//        cbb.addItem("汽车");cbb.addItem("火车");cbb.addItem("飞机");
        String items[]={"汽车","火车","飞机"};//创建条目字符串数组
        JComboBox cbb=new JComboBox(items);//创建下拉列表
//        cbb.setEditable(true);//可编辑
        c.add(cbb);
        setVisible(true);
    }

    public static void main(String[] args) {
        new Demo();
    }
}