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Differences between an Array and Collection

Posted on 2006-11-22
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Last Modified: 2008-01-09
May i know what is the differences between an Array and Collection? Thank you.
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Question by:retkehing
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Expert Comment

by:CEHJ
ID: 17997057
An array is inherently fixed in size, whereas a Collection can grow. That's the most important difference
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Accepted Solution

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sciuriware earned 30 total points
ID: 17997850
And: in an array the values are side by side,
a collection will scatter the values to positions where they are most convenient.
Every collection has its pro's and con's.
E.g.: linked lists can insert an item quickly but are a drag to sort.

;JOOP!
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Expert Comment

by:SamsonChung
ID: 17999157
Arrays a basic structures. for example, an array of integers means every single insert in there is an integer.

while in collection, you don't have that limitation.

you can have first object being an integer, 2nd being a String, 3rd being a string, 4th being an INTEGGER..

noticed, string and INTEGGER are not typos, they are custom classes you can define.

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Expert Comment

by:sciuriware
ID: 18001058
SamsonChung, what would you say about this code piece?

     Object[] array = new Object[4];

     array[0] = "12345";
     array[1] = new Integer(6);
     array[2] = new Exception("Also!");
     array[3] = this;

???

;JOOP!
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