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Posted: April 2, 2010 10:22 pm  | |
      IRC Nickname: Gibble00 Group: Emeritus Posts: 775 Member No.: 100 Joined: January 3, 2008 Total Events Attended: 9    | Okay, I know some of yall can do Java programming. I'm dealing with arrays of People (class) that have several properties such as age (int), gender (char), and salary (int) and I need an instance method that adds a new item of type Person to the array of existing Persons (called 'people') and I'm having trouble adding them to this array. This is the code I need to edit: void addPerson (Person p){ // adds a person p to the end of the population instance variable // You complete this method } I'm having trouble doing this I think, I don't actually know if this is what's not working for me because my program doesn't have any errors but it won't run. I tried using ArrayList.add but that returns a void result and I need a result of type Person. --------------------  |
Posted: April 3, 2010 01:09 pm | |
 IRC Nickname: Tnuac Group: Emeritus Posts: 1806 Member No.: 51 Joined: December 30, 2007 Total Events Attended: 58 | Been a while since i did all that i'm afraid =s -------------------- ~Aetas: carpe diem quam minimum credula postero~ "Seize the day and place no trust in tomorrow"  |
Posted: April 18, 2010 05:05 am | |
| IRC Nickname: Maxrobinsun Group: Emeritus Posts: 152 Member No.: 2095 Joined: October 16, 2009 Total Events Attended: 0 | I imagine that i'm probably too late to help but: import java.util.*; // Assume you have some people class already ArrayList<People> names; names = new ArrayList<People>(); Person p = new person(constructors here); names.add(p); ... Person[] result = new Person[names.size()]; names.toArray(result); It would be something like that I believe. However, if the array already exists then i'm afraid, you would have to find the nearest empty item in the array and add it there, or if the array is full, create a new one of size: Old + 1 and then copy it over and insert the new element. (Try Arrays.copyOf. EDIT: URL screws with tags: http://java.sun.com/javase/6/docs/api/java...28boolean\[],%20int%29, again not sure if it will work but looks like an option) Or at least it should look something like that, it's been a while since I did Java --------------------  Joined September '04 |
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