I want to add an Object to a list or a set. Only 5 Objects shall be stored there. If the list is full, and a new Object wants to join (and it will every 50ms), the first (and oldest) element should be deleted. Since I'm addicted to jdk 1.3 (without any extensions!) I didn't find a good solution. Any ideas of an elegant, easy and fast way? Thanks!
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1What about writing your own class that uses a list internally and enforces said restrictions when adding elements? – reto Dec 17 '13 at 10:29
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3Why do you use `JDK 1.3` ? – Ruchira Gayan Ranaweera Dec 17 '13 at 10:29
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check when you're going to add a element that the list has 5 objects? if so delete the 0th object & add the new object, if it has less than 5 then add it directly. like ABP said you can do it in jdk 1.3 itself.
Ulaga
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As reto said, you can write your own structure to enforce whatever restrictions you wish on the data. It seems that you want to implement queue-like behavior. You can extend queue, so that you don't have to rewrite much of it's behavior (see http://docs.oracle.com/javase/tutorial/collections/custom-implementations/). However, if this solution is unappealing to you, you can simply implement a class with an internal array-list, and customize the behavior of the add method.
Azar
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java 1.3 supports collection. You can write your own ArrayList implementation for this. I am not sure what do you mean by "extensions".
A Paul
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You can find here how to optimize the collections in JDK 1.3 or 1.2 http://www.precisejava.com/javaperf/j2se/Collections.htm#Collections102
Aroon
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