import java.awt.*;
import java.awt.event.*;
public class User1 extends WindowAdapter 
                                 implements ActionListener,ItemListener
{
    Frame f;
    TextField tf1,tf2;
    Checkbox cb1,cb2;
    Choice c1,c2;
    List ls1;
    Button b1;
    public static void main(String arg[])
    {
        (new User1()).display();
    }
    public void display()
    {
        Panel p1,p2;
        CheckboxGroup cg;
        f = new Frame("Input student ");
        f.setSize(480,200);
        f.setLocation(200,140);
        f.setBackground(Color.lightGray);
        f.setLayout(new GridLayout(1,2));      //網格布局,左右分隔窗口
        ls1 = new List();                      //創建列表框
        f.add(ls1);                            //占據窗口左半部分
        p1 = new Panel(); 
        p1.setLayout(new GridLayout(6,1));     //網格布局,6行1列
        f.add(p1);                             //占據窗口右半部分
        tf1 = new TextField ("1");             //創建組件
        tf2 = new TextField ("Name");
        cg = new CheckboxGroup();              //創建復選框組
        cb1 = new Checkbox("male",cg,true);    //創建單選按鈕
        cb2 = new Checkbox("female",cg,false);
        c1 = new Choice();                     //創建選擇框
        c1.addItem("江蘇省");                  //添加選擇框的選項
        c1.addItem("浙江省");
        c1.addItemListener(this);              //注冊選擇框事件監聽程序
        c2 = new Choice();                     //創建選擇框
        c2.addItem("南京");
        b1 = new Button("Add");
        b1.addActionListener(this);
        p1.add(tf1);                           //組件依次添加到面板p1上
        p1.add(tf2);
        p2 = new Panel(); 
        p2.setLayout(new FlowLayout(FlowLayout.LEFT));
        p2.add(cb1);
        p2.add(cb2);
        p1.add(p2);
        p1.add(c1);
        p1.add(c2);
        p1.add(b1);
        f.addWindowListener(this);
        f.setVisible(true);
    }
    public void windowClosing(WindowEvent e)
    {
        System.exit(0);
    }
    public void actionPerformed(ActionEvent e)
    {
        if (e.getSource()==b1)                   //單擊Add按鈕時
        {
            String str;
            str = tf1.getText()+"  "+tf2.getText();
            if (cb1.getState())               //單選按鈕選中時,添加標簽
                str = str +"  "+cb1.getLabel();
            if (cb2.getState())
                str = str +"  "+cb2.getLabel();
            str = str+"  "+c1.getSelectedItem(); //獲得選擇框的選中項
            str = str+"  "+c2.getSelectedItem();
            ls1.add(str);                        //添加列表框選項
            tf1.setText(""+(Integer.parseInt(tf1.getText())+1));
        }                                        //編號自動加1
    }
    public void itemStateChanged(ItemEvent e)
    {
        if (c1.getSelectedIndex()==0)            //對選擇框c1操作時觸發
        {
            c2.removeAll();                      //清除選擇框c2全部內容
            c2.addItem("南京");                  //選擇框c2添加內容
            c2.addItem("蘇州");
            c2.addItem("無錫");
        }
        if (c1.getSelectedIndex()==1)
        {
            c2.removeAll();
            c2.addItem("杭州");
            c2.addItem("寧波");
            c2.addItem("溫州");
        }
    }
}