[多选]
public class Key {
private long id1；
private long 1d2；
// class Key methods
}
A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（）

A . public int hashCode（）
B . public boolean equals（Key k）
C . public int compareTo（Object o）
D . public boolean equals（Object o）
E . public boolean compareTo（Key k）

撰拟文稿的正确顺序是（）拟写提纲—安排结构—书写文稿。安排结构—书写文稿—拟写提纲。安排结构—拟写提纲—书写文稿。拟写提纲—书写文稿—安排结构。皮亚杰认为，儿童的道德判断是（）从不可逆发展到可逆。从前世俗水平发展到世俗水平。从自律发展到他律。从他律发展到自律。在篮球规则中时间类违例有哪些？物理性危险、有害因素包括哪些？理想是一定社会关系的产物，它必然带着特定历史时代的烙印，在阶级社会中，还必然带着特定阶级的烙印（）是。否。

public class Key {
private long id1；
private long 1d2；
// class Key methods
}
A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（）

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[多选] public class Key { private long id1； private long 1d2； // class Key methods } A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（）

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[多选]
public class Key {
private long id1；
private long 1d2；
// class Key methods
}
A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（）