Extend AbstractListModel to create string array based model for JList in Java

  /*from w w w.j a  v a  2  s.  com*/

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.AbstractListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;

public class Main extends JFrame {
  BorderLayout borderLayout1 = new BorderLayout();
  JList list1 = new JList();
  JButton fillButton = new JButton();

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

  public Main() {
    this.getContentPane().setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    fillButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        ListData ld = new ListData();
        long tmStart = System.currentTimeMillis();
        list1.setModel(ld);
        list1.repaint();
        long tmEnd = System.currentTimeMillis();
        System.out.println(tmEnd - tmStart);

      }
    });
    fillButton.setText("Fill");
    this.getContentPane().add(new JScrollPane(list1), BorderLayout.CENTER);
    this.getContentPane().add(fillButton, BorderLayout.SOUTH);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    setVisible(true);
  }

}

class ListData extends AbstractListModel {
  String[] strings = new String[10000];

  public ListData() {
    for (int i = 0; i < 10000; i++) {
      strings[i] = "bob" + i;
    }
  }

  public int getSize() {
    return strings.length;
  }

  public Object getElementAt(int index) {
    return strings[index];
  }
}