how to add to jtable from array list code example

Example: how to populate a jtable from arraylist

import java.awt.BorderLayout;
import java.util.ArrayList;
//from   ww w .  java  2 s. co m
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class Main extends JFrame {
  JTable  table = new JTable();
  DefaultTableModel model = new DefaultTableModel();
  JScrollPane scroll;
  String headers[] = { "col1", "col2" };
  String[] data = { "AA", "BB", "CC", "DD", "EE", "FF", "GG", "HH", "II", "JJ",
      "KK", "LL", "MM", "NN", "OO", "PP", "QQ", "RR" };

  public Main() {    
    model.setColumnIdentifiers(headers);   
    table.setModel(model);
    scroll = new JScrollPane(table);

    insert();

    add(scroll, BorderLayout.CENTER);
    setSize(300, 300);
    setVisible(true);
  }

  public void insert() {
    ArrayList<String> ar = new ArrayList<String>();
    for (int i = 0; i < data.length; i++) {
      ar.add(data[i]);
    }

    for (int i = 0; i < (ar.size() / 2); i++) {
      model.addRow(new Object[] { String.valueOf(ar.get(2 * i)),
          String.valueOf(ar.get((2 * i) + 1)) });
    }
  }

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