Core APIs - Collections: Lists, Sets, and Maps

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A collection is an object that contains other objects and provides methods for working on the objects it contains. A collection may consist of objects of the same type, but it can contain objects of different types too.

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Topics	Author	Replies	Views	Last Post
Is this a bug ?	Gbas13	1	43	Nov 24, 2009 4:15 AM by JoachimSauer »
java.lang.IndexOutOfBoundsException [locked]	raghuveer_vellanki	5	9,113	Nov 23, 2009 8:08 PM by sabre150 »
how to copy elements of vevtor page: 1 2	pkj	18	310	Nov 23, 2009 9:17 AM by jverd »
Default size of ArrayList and Vector	arun_pratap_java	6	78	Nov 23, 2009 4:51 AM by JoachimSauer »
HashMap inside another HashMap	vanhalt	11	156	Nov 19, 2009 12:50 PM by vanhalt »
help with hashmap copying ! [locked] page: 1 2	wisefingaz	15	629	Nov 19, 2009 12:32 PM by kajbj »
Thread safty	JHack	11	440	Nov 19, 2009 12:14 PM by endasil »
Wacky Comparator.	CaptainHastings	6	410	Nov 19, 2009 11:23 AM by jverd »
Map : containsKey() then get() or get() and test for null?	darkperfect	13	217	Nov 19, 2009 7:42 AM by jverd »
Hashtable Class [locked]	er_vishaljindal	6	666	Nov 19, 2009 4:53 AM by kajbj »
Searching for objects in collection [locked] page: 1 2	relaxedgalaxy	16	1,317	Nov 19, 2009 4:52 AM by kajbj »
Count elements in ArrayList	I_hate_java_	14	404	Nov 17, 2009 10:58 AM by kajbj »
Sorting Parallel ArrayLists	darrenlight85	2	123	Nov 17, 2009 3:23 AM by dcminter »
Out of memory error while populating arraylist	Ahmad_22	8	285	Nov 16, 2009 6:23 AM by sabre150 »
Issue: size() returns 0 after setting ArrayList's initial size	XtremeRPGplayer	10	268	Nov 16, 2009 5:29 AM by dannyyates »

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