HashMap in java

HashMap in java

HashMap uses Hashing technique for storing key and value pair in java.

The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls.

Java HashMap is a part of collection since jdk 1.2 versions. HashMap implements the Map interface and extends AbstractMap class. HashMap stores data in key & value pairs.  

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TreeSet Class in Java with example

TreeSet Class in Java with example

Java TreeSet class which implements NavigableSet interface which is child interface of SortedSet interface. Objects in TreeSet class are stored in sorted ascending order.

TreeSet is similar to HashSet except that it sorts the elements in the ascending order while HashSet doesn’t maintain any insertion or ascending order.

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LinkedHashSet in java

LinkedHashSet in java

Java LinkedhashSet class is collection class which implements Set interface. HashSet does not maintains insertion order but LinkedHashSet maintains insertion order of object also LinkedHashSet class is non-synchronized. 
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HashSet in java

HashSet in java

Java HashSet is an collection class which implements Set interface. It is an    un-ordered collection means insertion order is not followed of object in which duplicate value are not allowed. read more...

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List in Java

List in Java

Java List interface is an ordered collection which follows the insertion order of the element. The user of this interface has precise control over where in the list each element is inserted. We can access the element by their integer index and search for element in the List. read more...

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Vector class in java

Vector class in java

Vector class is synchronized in nature that’s why whatever operations we perform on vectors. Vector class automatically applies a lock to that operation.

Vector class implements List interface so vector class is also growable in nature which internally resizes array when the elements gets added or removed. 

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Linked List in Java

LinkedList in java is linear data structures in which element are stored in the different locations and element that are stored in the different location of memory are called as node.  read more ... 

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Beginning of java

Beginning of Java

Beginning of java from techfloaters

Initially, James Gosling other team members started to develop the project in C++, but they faced many problems in C++ compiler regarding with different platform. 

So that time, James Gosling started working on a new language called Oak  which was later in 1995 renamed as Java.. read more..

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How ArrayList works internally in java

How ArrayList works internally in java

ArrayList internally uses array data structure and ArrayList grows dynamically when the element are added in the ArrayList as it is create the new array with size greater by its original array capacity….  read more..

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Java Collections - ArrayList

JavaCollections – ArrayList

ArrayList internally uses array data structure and ArrayList is resizable and growable array in nature which implements the List interface... read more...

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