i want to synchronize this two table 5 and 8 in swing in threading but with help of synchronize block it is not done

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Java

package threading;

import javax.swing.JLabel;


public class Tabel extends javax.swing.JFrame {

/** Creates new form Tabel */
public Tabel() {
initComponents();
}

/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

jButton1 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});

jLabel1.setText("jLabel1");

jLabel2.setText("jLabel2");

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(170, 170, 170)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 140, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(126, 126, 126)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 83, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(112, 112, 112)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 101, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addContainerGap(136, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(38, 38, 38)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(149, 149, 149)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(207, Short.MAX_VALUE))
);

pack();
}//

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here

Syncrodemo obj=new Syncrodemo(jLabel1,jLabel2);
Thread11 obj1=new Thread11(obj);
obj1.start();
Thread12 obj2=new Thread12(obj);
obj2.start();

}
class Syncrodemo
{
int num;
JLabel lbl;
JLabel lbl1;

Syncrodemo(JLabel lbl,JLabel lbl1)
{
this.lbl=lbl;
this.lbl1=lbl1;
}
void printtable(int num,JLabel lbl)
{
synchronized(this)
{

this.num=num;
for(int i=1;i<=10;i++)
{
try{




jLabel1.setText(""+i*num);

jLabel2.setText(""+i*num);
wait(1000);
}
catch(Exception ex)
{}
}
}
}}
class Thread11 extends Thread
{


Syncrodemo t;
public Thread11(Syncrodemo t)
{
this.t=t;
}
public void run()
{
t.printtable(5,jLabel1);
}
}
class Thread12 extends Thread
{
Syncrodemo t;
public Thread12(Syncrodemo t)
{
this.t=t;
}
public void run()
{
t.printtable(8,jLabel2);
}
}


/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {

public void run() {
new Tabel().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
// End of variables declaration
}