import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.List;
public class JTableDemo4 extends JFrame implements ActionListener{
    private JTable[] jTable=new JTable[3];
    //    private JButton bn1,bn2,bn3;
    private JComboBox combobox=null;
    private JPanel panel=null;
    private MyModel[] model=new MyModel[3];
    private JScrollPane s_pane=null;
    private Container contentPane=null;

    public JTableDemo4(String title){
        super(title);
        model[0]=new MyModel(2);
        jTable[0]=new JTable(model[0]);

        model[1]=new MyModel(4);
        jTable[1]=new JTable(model[1]);

        model[2]=new MyModel(6);
        jTable[2]=new JTable(model[2]);
        contentPane=this.getContentPane();
        combobox=new JComboBox();
        combobox.addItem("table1(2 users)");
        combobox.addItem("table2(4 users)");
        combobox.addItem("table3(6 users)");

        combobox.addActionListener(this);

        panel=new JPanel();
        panel.add(combobox);

        List<User> list1=new ArrayList<User>();
        for(int i=0;i<3;i++){
            User u=new User(i,"user"+i,"list1");
            list1.add(u);
        }


        s_pane=new JScrollPane(jTable[0]);
        contentPane.add(panel,BorderLayout.SOUTH);
        contentPane.add(s_pane,BorderLayout.CENTER);
        pack();
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        System.out.println("action performed");
        int index=combobox.getSelectedIndex();
        System.out.println("index:"+index);
        jTable[0].setModel(model[index]);
        jTable[0].updateUI();
//        s_pane.removeAll();
//        s_pane.add(jTable[index]);
////        s_pane=new JScrollPane();
//
//        s_pane.validate();
//        contentPane.validate();
//        this.validate();
//        this.repaint();
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        new JTableDemo4("MyDemo");
    }

    class MyModel extends AbstractTableModel{
        private ArrayList<User> list;
        private String [] title_name={"ID","用户名","密码"};
        /**
         * 初始化构造
         */
        public MyModel(){
            list=new ArrayList<User>();
            for(int i=0;i<5;i++){
                User user=new User(i,"user"+i,"user"+i);
                this.list.add(user);
            }

            /*
                * 这里数据结构当中加进去多少的数据，
                * 虚拟机会利用getValueAt(int row,int col)方法
                * 全部给取出显示
                */

        }

        public MyModel(int userNum){
            list=new ArrayList<User>();
            for(int i=0;i<userNum;i++){
                User user=new User(i,"user"+i,"user"+i);
                this.list.add(user);
            }

            /*
                * 这里数据结构当中加进去多少的数据，
                * 虚拟机会利用getValueAt(int row,int col)方法
                * 全部给取出显示
                */

        }

        public void addRow(long id,String userName,String password){
            User user=new User(id,userName,password);
            list.add(user);
        }

        public void removeRaw(int row){
            list.remove(row);
            this.fireTableRowsDeleted(1,row+1);
        }

        public int getColumnCount() {
            // TODO Auto-generated method stub
            System.out.println("invoke method getColumnCount");
            return title_name.length;
        }

        public String getColumnName(int col) {
            System.out.println("invoke method getColumnName");
            return title_name[col];
        }

        public int getRowCount() {
            // TODO Auto-generated method stub
            return list.size();
        }

        public Object getValueAt(int rowIndex, int columnIndex) {
            // TODO Auto-generated method stub
            //System.out.println("invoke method getValueAt");
            User result=list.get(rowIndex);
            return result.get(columnIndex);
        }

        public void setValueAt(Object value, int row, int col){
            if(col==0)
                list.get(row).setId((Long)value);
            if(col==1)
                list.get(row).setUserName((String)value);
            if(col==2)
                list.get(row).setPassword((String)value);
            this.fireTableCellUpdated(row, col);
        }

        public boolean isCellEditable(int rowIndex, int columnIndex){

            return true;
        }
        /**
         * 返回数据类型
         */
        public Class getColumnClass(int col) {
            return getValueAt(0, col).getClass();
        }




    }

    class User{
        private long id;
        private String userName;
        private String password;

        public User(){}

        public User(long id,String userName,String password){
            this.id=id;
            this.userName=userName;
            this.password=password;
        }

        public Object get(int i){
            if(i==0)
                return this.id;
            if(i==1)
                return this.userName;
            if(i==2)
                return this.password;
            else
                return null;
        }

        public String getPassword() {
            return password;
        }

        public void setPassword(String password) {
            this.password = password;
        }

        public String getUserName() {
            return userName;
        }

        public void setUserName(String userName) {
            this.userName = userName;
        }

        public long getId() {
            return id;
        }

        public void setId(long id) {
            this.id = id;
        }
    }

}