 Working With Objects In Java, searching with objects |
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 Jan 23 2005, 07:38 AM
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#1
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Super Member  Group: Members Posts: 436 Joined: 21-January 05 From: Koronadal City, Philippines Member No.: 3,358  |
our teacher assigned us to do an IS that uses object oriented programming language. i decided to use java but im having a few troubles linking objects with other objects when im searching... can anyone help me? tnx.
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Jan 23 2005, 11:59 AM
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#2
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Super Member Group: Members Posts: 378 Joined: 8-January 05 Member No.: 3,174 |
QUOTE(leiaah @ Jan 23 2005, 09:38 AM) our teacher assigned us to do an IS that uses object oriented programming language. i decided to use java but im having a few troubles linking objects with other objects when im searching... can anyone help me? tnx.  If you could post the problem here that would be great. Like: What you want, what isn't working, relevant code (if any). 
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Feb 6 2005, 06:48 AM
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#3
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Super Member Group: Members Posts: 436 Joined: 21-January 05 From: Koronadal City, Philippines Member No.: 3,358 |
well i know how to write a file and to read a file but im having trouble searching for one particular object. I put an object ID on each object that I made and I was wondering how to search for it. Should I be using array? thanks.
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Feb 6 2005, 01:22 PM
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#4
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Super Member Group: Members Posts: 378 Joined: 8-January 05 Member No.: 3,174 |
I hope I've understood it right that you have a number of Objects, and each Object has its own ID. And you have to make something that gets an Object when you search for its ID.
In that case I recommend HashTable. Something like: CODE Hashtable objects = new Hashtable(); hashtable.put("Object#1", new MyObject()); And this to get an object CODE MyObject o = (MyObject)objects.get("Object#1"); You can think of a HasTable as a table with two columns. One column hold the identifiers/keys the other the Objects. So if you have an Object you call "ob" and "ob" has a public method called "getID()" which returns the ID, and a HashTable you call "ht" then you can store the Object in the HashTable by: ht.put(ob.getID(), ob); Read more here: http://java.sun.com/j2se/1.4.2/docs/api/ja.../Hashtable.html |
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