private void showTask(ArrayList list)
{
for(int i=0; i<list.size();i++)
{
Task task = (Task)list.get(i);
System.out.println(Task.toString();)
}
}

private void showTasks(ArrayList list)...{

for(int i=0; i<list.size(); i++)...{
Task t = (Task)list.get(i);
t.showTask();
}
}