Java Frame with Fading Effect

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import java.util.Timer;
import java.util.TimerTask;
import javax.swing.*;
import java.awt.*;
public class FadeDemo extends JFrame
{
   JFrame frm=null;
   JLabel l1=new JLabel("Look at Frame, Its Fading",JLabel.CENTER);
   float s=1.0f;
   boolean flag=true;
   FadeDemo()
   {   frm=this;
       frm.setUndecorated(true);
       frm.getContentPane().setBackground(Color.orange);    
       l1.setFont(new Font("Times new roman",Font.BOLD,12));
       add(l1,BorderLayout.CENTER);
       setBounds(100,50,450,550);
       setVisible(true);
       Timer timer = new Timer();
       timer.schedule(new TimerTask()
          {   public void run()
               {
                if(s<=0.9f && flag)
                {
                    frm.setOpacity(s);
                    s+=0.01f;
                }
              else
                {
                  frm.setOpacity(s);
                  s-=0.01f;
                  if(s<=0.01f)
                   flag=true;
                  else
                    flag=false;
                }
              } //run
            },0,10);
   }
    public static void main(String[] args)
    {
       new FadeDemo();
    }
}

Output of Program :

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