接口不能实例化，能否创建引用呢？

Rt
Consider the class hierarchy shown below:

Animal
  |
Mammal
/ / \ \
      /  /   \  \
    /   /     \   \
  /    /       \    \
/     /         \     \
      /      /           \      \
    /       /             \       \
  /        /               \        \
Dog      Cat     Raccoon    Swamp
     (implements)     (implements) Thing
     ( Washer   )     ( Washer   ) Consider the following code:
1. Raccoon rocky;
2. SwampThing pogo;
3. Washer wawa;
4.
5. rocky = new Raccoon();
6. wawa = rocky;
7. pogo = wawa;Which of the following statements is true?
这是一道scjp的题目，好像看上去接口能创建引用阿