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);