多选题 Given:
2. class Chilis {
3. Chilis(String c, int h) {color = c; hotness = h; }
4. String color;
5. int hotness;
6. public boolean equals(Object o) {
7. Chilis c = (Chilis)o;
8. if(this.color == c.color) return true;
9. return false;
10. }
11. public int hashCode() {return (color.length() + hotness);
12. }
If instances of class Chilis are to be used as keys in a Map, which are true?(Choose all that apply.)

A、 The code will not compile.
B、 The hashCode() and equals() contracts have been supported.
C、 The equals() method is reflexive, symmetric, and transitive.
D、 The Chilis class CANNOT be used to create keys to reliably add and retrieve entries in a Map.
E、 If the hashCode() method is not considered, the equals() method could be an override that supports the equals() contract.
F、 If the equals() method is not considered, the hashCode() method could be an override that supports the hashCode() contract.

【正确答案】 C、D、E、F

【答案解析】