JAVA - Collections Tutorials

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  • Sorting Map by value and key in Java - ascending

    Unlike List and Sort, sorting Map implementations like HashMap and Hashtable is not easy. There are two ways to sort HashMap, either by key or by valu
    http://javarevisited.blogspot.com/2012/12/how-to-sort-hashmap-java-by-key-and-value.html
    • 25756 Hits
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  • Finding common objects in two Set with example

    Set interface in Java is used to store unique elements, they restrict duplicates, but how do you find common elements between two set e.g. intersectio
    http://javarevisited.blogspot.com/2012/12/union-and-intersection-of-two-set-in-java-guava-...
    • 14679 Hits
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  • BlockingQueue Example in Java Concurrency

    BlockingQueue in Java is introduced as part of java.util.concurrent package in Java 5. BlockingQueue implements Queue interface, which is also added o
    http://javarevisited.blogspot.com/2012/12/blocking-queue-in-java-example-ArrayBlockingQueu...
    • 15239 Hits
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  • HashSet vs TreeSet vs LinkedHashSet vs EnumSet in Java

    Set has several implementation in Java Collection Framework e.g. EnumSet, HashSet, TreeSet, LinkedHashSet, and CopyOnWriteArraySet, this article compa
    http://javarevisited.blogspot.com/2012/11/difference-between-treeset-hashset-vs-linkedhash...
    • 17634 Hits
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  • Searching in Array in Java Program Example

    Unlike Collection classes, array does not provide any contains() method to search an object in array, only way to search in array is to loop through a
    http://javarevisited.blogspot.com/2012/11/4-ways-to-search-object-in-java-array-example.html
    • 15326 Hits
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  • How to create read only Collection in Java with Example

    Read only collection means any collection which once created can not be modified i.e. you can not add new elements, you can not remove elements and ev
    http://javarevisited.blogspot.com/2012/07/create-read-only-list-map-set-example-java.html
    • 14326 Hits
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  • What is different on List and Set in Java Collection

    Main difference between Set and List is that Set does not allow any duplicates and only store unique objects while List allow duplicates. Another diff
    http://javarevisited.blogspot.com/2012/04/difference-between-list-and-set-in-java.html
    • 13862 Hits
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  • finding duplicates in a Array , file

    The following tutorial covers How to find and remove duplicates in array , file , line of text
    http://www.techlabs4u.com/2012/04/java-to-find-print-duplicates-using-or.html
    • 15653 Hits
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  • How to change ArrayList to HashSet in Java Example

    Quick way to convert ArrayList to Set in java with simple example , though its worth noting that all those method will eat duplicates silently and siz
    http://javarevisited.blogspot.com/2012/01/convert-arraylist-to-set-java-example.html
    • 13618 Hits
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  • How to create anonymous string array in Java Example

    Anonymous array are good to implement variable argument methods and they are used for that purpose prior to jdk5 introduced varargs.
    http://javarevisited.blogspot.com/2012/01/anonymous-array-example-java-create.html
    • 14061 Hits
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  • Java TreeMap Example in Java

    TreeMap in Java is the best solution for Java programs which are looking for sorted datastrucutre. TreeMap in Java sort keys based on either their nat
    http://javarevisited.blogspot.com/2011/12/treemap-java-tutorial-example-program.html
    • 13260 Hits
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  • Interview questions asked in Java Collections

    Java collection interview questions are core part of any java interview. Collection interview consists question on various collection classes like has
    http://javarevisited.blogspot.com/2011/11/collection-interview-questions-answers.html
    • 13852 Hits
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  • How to use Iterator in HashMap in Java Program

    Iterators in Java are core of Collection package. They provide most important traversing functionality around objects stored in Collections. No matter
    http://javarevisited.blogspot.com/2011/10/java-iterator-tutorial-example-list.html
    • 12717 Hits
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  • What are differences in HashSet vs HashMap in Java

    have you used hashmap or hashset, if yes then you must be aware of where to use hashmap and where we can use hashset. if not then go and read this art
    http://javarevisited.blogspot.com/2011/09/difference-hashmap-vs-hashset-java.html
    • 12364 Hits
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  • How HashMap works in Java

    How HashMap works in Java or sometime how get method work in HashMap is common interview questions now days. Almost everybody who worked in Java knows
    http://javarevisited.blogspot.com/2011/02/how-hashmap-works-in-java.html#comment-form
    • 12172 Hits
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  • Difference between HashMap and HashTable

    This question oftenly asked in interview to check whether candidate understand correct usage of collection classes and aware of alternative solutions
    http://javarevisited.blogspot.com/2010/10/difference-between-hashmap-and.html
    • 12243 Hits
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  • What is the difference between Enumeration and Iterator

    This question is from early ages of interview , I have not seen this question on recent interviews but it was common during 2006-2007 , now days quest
    http://javarevisited.blogspot.com/2010/10/what-is-difference-between-enumeration.html
    • 12159 Hits
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