Lambda, Predicate

class Animal {
 boolean canHop = true;
 boolean canSwim;
 int x = 1;
 int y = 10;
}

interface CheckIface {
 int test1(Animal a);
}

//interface Predicate {
// boolean test(T t);
//}

class Solution {
 static final int i = 0;

 public static void main(String[] args) {
  Animal animal = new Animal();
  print1(animal, a -> {
   return a.x;
  });
  print1(animal, a -> a.y);
  print1(animal, a -> {
   return a.canHop ? 1 : 0;
  });

  print(animal, a -> a.canHop);
  print(animal, a -> a.canSwim);
 }

 static void print1(Animal a, CheckIface check) {
  if (check.test1(a) > 0)
   System.out.println("test " + check);
 }

 static void print(Animal a, Predicate<Animal> check) {
  if (check.test(a))
   System.out.println("test1 " + check);
 }