java.util.Comparator Implementation

[Navatha]

Hi all ,
Can you please help me understand the following question.I have been attending the interviews .I have been asked this in one of the interview.Thanks in advance.
Assume the following code snippet exists inside a java.util.Comparator implementation.
Fill in the method.

/**
* Compares o1 and o2.
* @return -1 if o1's first name, middle name are lexically less
* than o2's first name, middle name, 0 if o1's first name
* and middle name are lexically the same as o2's,
* and 1 otherwise.
*/
public int compare(Object o1, Object o2) {
// Write your code here.
}

Override the following methods for an implementation of Person:

•

int java.lang.Object.hashCode()
boolean java.lang.Object.equals(Object o)

[Fubarable]

You seem to be missing some things here including:

• The declarations for class fields of Person,
• Code tags (please see my signature link below) and
• Your attempt at a solution first.

Much luck!

[Navatha]

Hi Sorry,i didn't post the first part of the question here it is
Object Implementation
• Implement a comparator for the Person class that can be used to sort by first name and middle name for the following Interface.

public Interface Person {
String getFirstName();
String getMiddeName();
String getLastName();
Date getBirthDate();
Person[] getParents();
Person[] getChildren();
// etc.
}

[curmudgeon]

Hi Sorry,i didn't post the first part of the question here it is
Object Implementation
• Implement a comparator for the Person class that can be used to sort by first name and middle name for the following Interface.

public Interface Person {
String getFirstName();
String getMiddeName();
String getLastName();
Date getBirthDate();
Person[] getParents();
Person[] getChildren();
// etc.
}

That helps, but...

You seem to be missing some things here including:

• The declarations for class fields of Person,
• Code tags (please see my signature link below) and
  
• Your attempt at a solution first.

You seem to have also forgotten to post your attempt at a solution?

[Tolls]

They're a bit out of date as well...that's a Java 1.4 Comparator!

[ilu341]

@Navatha or others found the answer, if so please post or email me [mod edit: deleted]

[Fubarable]

@Navatha or others found the answer, if so please post or email me [mod edit: deleted]

ilu341, please do not post your email address or request info sent by email. That's against forum rules. If you have a question, please start your own thread and ask it. You may link to this thread if desired.