Question

Java methods and instance methods. I need help with part b)ii) and part c)ii)

Answer 1

Disclaimer: this is not the exam paper (or at least the current one), I'm just practicing exam style questions and I got stuck...

Answer 2

in part b)ii) does that mean that the equals method for the class already exists or do I have to write that too.

this is what I got for part c)i)
```
public static boolean before(Date d1, Date d2)
{
if (d1.year < d2.year)
return true;
else
if (d1.month < d2.month)
return true;
else
if (d1.day < d2.day)
return true;
else return false;
}
```
I just don't know what to do next

Answer 3

@woodrow73 @theEric @abtster @caominhim @e.mccormick @pitamar

Answer 4

Lets say d1 year is after d2 year.. like d1 = march(3) 2030, and d2 = september(9)2010 -
```
if (d1.month < d2.month)
return true;
```
that code will then execute, then you'll be saying d1 is before d2 based off the month; a different approach is needed for that problem.

Answer 5

For b)ii) I would create your own equals method in date class to override the normal (I think it's a method of Object) equals method.. otherwise I think it's just checking whether the 2 date objects share the same reference to memory.. not the dates themselves.

Answer 6

For c)ii) seems like it involves OOP and arrays.. what's unclear on that one - how far did you get?

Answer 7

Ok thanks, i think i was busier freaking out than actually doing the questions.
So like you said i created equals method for date and then the rest of b)ii) was much easier, coz i knew what i was meant to be doing
My answer to c)ii) had a glitch, my inner loops should only have been executing when the outer loop was an equivalence…so i fixed that

Answer 8

For c)ii) i did:

public static String oldName(Student [] stds) {
Student oldest=stds[0];
for (int i=0; i<stds.length; i++){
if (Date.before(stds[i].birthDate, oldest.birthdate) == true)
oldest = stds [i];
}
return oldest.secondName;
}

Answer 9

Good to hear