Find output of the following Java code snippet :
String City = "Delhi" ,PinCode="110001", Str=" " ;
City=City+" "+PinCode ;
JOptionPane.showMessageDialog(null,City) ;
int l=City.length ( ) ;
int i=0 ; while (i<1)
{
Str=Str+City.substring (6) ;
i = i +15 ;
}
JOptionPane.showMessageDialog (null.Str) ;