Problema com thread

package tela;

import java.awt.EventQueue;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;


public class Class1 extends JFrame {
    JLabel jlabel = new JLabel();
    JButton jButton1 = new JButton();
    int cont = 0;


    public Class1() {

        try {
            jbInit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void jbInit() throws Exception {
        this.getContentPane().setLayout(null);
        jlabel.setBounds(new Rectangle(50, 15, 135, 25));
        jButton1.setText("jButton1");
        jButton1.setBounds(new Rectangle(80, 50, 75, 30));
        jButton1.addActionListener(new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                        jButton1_actionPerformed(e);
                    }
                });

        this.getContentPane().add(jButton1, null);
        this.getContentPane().add(jlabel, null);
        setLayout(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(500, 500);
        setVisible(true);
    }

    public void ii() {

        try {

            Thread t = new Thread();

            while (true) {
                EventQueue.invokeLater(new Runnable() {
                            public void run() {
                                // Só podemos chamar setHora diretamente dessa
                                // forma, pois esse Runnable é uma InnerClass não
                                // estática.
                                jlabel.setText("" + cont);
                            }
                        });

                cont++;

                System.out.println(cont);

                try {
                    t.sleep(1000);
                } catch (InterruptedException u) {
                    System.out.println(u);
                }
            }


        } catch (Exception r) {
            System.out.println(r);
        }
    }

    private void jButton1_actionPerformed(ActionEvent e) {

    }

    public static void main(String[] args) {
        Class1 g = new Class1();
        g.ii();

    }
}