static void Main(string[] args)
{
clock c1 = clock.getInstance();
clock c2 = clock.getInstance();
clock c3 = clock.getInstance();
Console.Write("By c1, the time is: ");
c1.printTime();
Console.Write("By c2, the time is: ");
c2.printTime();
Console.Write("By c3, the time is: ");
c3.printTime();
}
public static clock getInstance()
{
if (INSTANCE != null)
{
return(INSTANCE);
}
lock (key)
{
if (INSTANCE == null)
{
INSTANCE = new clock();
}
return(INSTANCE);
}
}