interface MyFunc<T> { boolean func(T v1, T v2); }

class HighTemp {
  private int hTemp;

  HighTemp(int ht) { hTemp = ht; }

  boolean lessThanTemp(HighTemp ht2) {
  return hTemp < ht2.hTemp;
 }
 }

class InstanceMethWithObjectRefDemo {
 static <T> int counter(T[] vals, MyFunc<T> f, T v) {
 int count = 0;

for(int i=0; i < vals.length; i++)

//*** THIS LINE
  if(f.func(vals[i],v)) count++;

return count;
}

 public static void main(String args[])
{
int count;

HighTemp[] weekDayHighs2 = { new HighTemp(32), new HighTemp(12),
                            new HighTemp(24), new HighTemp(19),
                            new HighTemp(18), new HighTemp(12),
                            new HighTemp(-1), new HighTemp(13) };


count = counter(weekDayHighs2, HighTemp::lessThanTemp,
                new HighTemp(19));
System.out.println(count + " days had a high of less than 19");
  }
}