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Generics Collection Tutorials with examples and interview questions with answers
R4R provides Generics Collection Tutorials with examples and interview questions with answers .Through R4R you can develop learn Collection Frameworks concepts in very easy ways . R4R covers end to end Collection tutorials wit examples for fresher and experienced
Posted By: Shashi     Posted Date:05.08.14

Write a program for Iterator Interface.

We are creating a custom Iterator class and overriding  all its methods .We have an Object array which contains data we Iterator  data trough our custom Iterator class


Posted By: Shashi     Posted Date:05.07.14

Enumeration Interface

We are creating a custom Enumeration class and overriding  all its methods .We have an Object array which contains data we retrieve data trough our custom Enumeration class.


Posted By: Shashi     Posted Date:05.07.14

Write a program for Using ListIterator

Here we cover ListIterator examples .We create an ArrayList object add some values apply  listIterator() methods and store results into  ListIterator .Now we can Iterator over backward or forward direction


Posted By: Shashi     Posted Date:05.07.14

Collections Framework Overview

Collections Framework provides the well-designed set of interfaces and classes for storing and manipulating groups of data as a single unit, a collection. The framework provide a convenient API to many of the abstract data types like: lists, trees, maps, sets, arrays, hash tables, and other collections. Due to their object-oriented design, Java classes in the Collections Framework encapsulate both the data structures and the algorithms associated with these abstractions. Also, these framework provide a standard programming interface to define higher-level data abstractions such as stacks, queues, and thread-safe collections.


Posted By: Shashi     Posted Date:05.07.14

Write a program for Map Interface

In this section we defined Map and put some values into Map we Iterator over Map map by using  entrySet() method which returns a Set then we can Iterator over set
 


Posted By: Shashi     Posted Date:05.07.14

Hashtable in Collection

A Hashtable is a specialized Dictionary that relies on a hashing algorithm to convert keys into a mechanism to look up values in the dictionary. When the key-value pair using in a hashtable, the keys are converted into an integer called a hash code by using a hashing algorithm. Now, this hash code is then reduced based upon the internal storage structure used by the hash table to serve as an index into this structure (an array). In case of two equal elements present into Hashtable, the hash code must be the same.


Posted By: Shashi     Posted Date:05.07.14

Write a program for Conversion Array to Vector form

In this example we will cover how we can cover an Array into a Vector. We create an string array and initialized with some values .Then we create an object of Vector we just use use method Arrays.asList() and pass into vector.addAll() methods to add all values into vector.


Posted By: Shashi     Posted Date:05.07.14

Array reflection

Array reflection is use whether an argument or object is an array, and easily retrieve the Object class.

In this we are going to give examples of Array reflection .Array refection used java.lang.reflection.Array package to create a instance of array


Posted By: Shashi     Posted Date:05.07.14

Define a Growable ArrayList

The ArrayList class extends AbstractList and implements the List interface. ArrayList supports dynamic arrays that can grow as needed, and also supported by the legacy class Vector.

We cover ArrayList examples .We create an object of ArrayList and store into ArrayList .We can store in List also. Then we add some values by using add() method .Then we check the size using size() method then we remove some object using remove() method then check size then again add some objects .So now we can see the size is changed so final calculation is Arraylist is growable 


Posted By: Shashi     Posted Date:05.07.14

Collection Classes:

Here we covers different interface and classes and description with complete package name .We caovers Collection Classes,Subinterfaces of Collection,Classes in java.util that implement Collection .Collection provide two types of class but none of the collection classes are synchronized, however it is possible to obtain the synchronized versions. Classes are:-

  • Classes which provide full implementations and that can be used as-is.
  • Others are abstract( means providing skeletal implementations),  that are used as starting points for creating concrete collections.

Posted By: Shashi     Posted Date:05.07.14

Collection interface and classes.

A collection represent a group of different object, as its element. But importantly some collection allow duplicate elements and other are not. In collection interface hierarchy all the interface define in java.util and java.beans packages with Superinterface Interable<E> . All the Known interface in collection is BeanContext, BeanContextServices, BlockingDeque<E>, BlockingQueue<E>, Deque<E>, List<E>, NavigableSet<E>, Queue<E>, Set<E>, SortedSet<E> etc


Posted By: Shashi     Posted Date:05.07.14

What is collection?

Collection is a interface, Part of java.util package and represents a group of objects, known as a elements of collection in order form or unordered form. All the class define into collection interface should be provide two standard types of constructor:-

  •  void (return no argument) constructor- Use for create an empty collection.
  • Constructor( return a single argument) of collection-  Use for creates a new collection with the same elements as its argument.

Posted By: Shashi     Posted Date:05.07.14

Subtyping in Generics
Generally, Subtyping is a key feature of object-oriented languages such as Java. In java, one type is subtype of another if they are related by an implement or an extends clause. Also, Subtyping is transitive, that means if one type is a subtype of a second, and the second is a subtype of a third, then the first is a subtype of the third.
Posted By: Shashi     Posted Date:05.07.14

Boxing and UnBoxing in Generics

Conversion of a primitive type to the corresponding reference type is called boxing and conversion of the reference type to the corresponding primitive type is called unboxing.  In Java, every type either reference type ( i.e.  any class, instance, or array type )or or a primitive type ( i.e. subtypes of class Object, any variable of reference type may be set to the value null). As seen in the table, there are eight primitive types, and each one of these has a corresponding library class( which located in the package java.lang ) of reference type.


Posted By: Shashi     Posted Date:05.07.14

Generics in Java
Generics is the part of Java programming language added as a part of J2SE 5.0( or JDK 1.5) in 2004. Generic allow the reference types( like classes, interface and array types) and methods to be parameterized with types information. Also, Generics allow to used the specified types of ADT( Abstract data Type, an ADT define both the types of objects and the operations that can be performed on these object.), so that same definition and behaviour of an ADT can be used on different types of object.
Posted By: Shashi     Posted Date:05.07.14

Generics and Collections( Version JDK-1.6 used)
Generics and Collections( Version JDK-1.6 used) Collections Framework interface , classes and there hierarchy with examples)
Posted By: Shashi     Posted Date:05.07.14

JSP Tutorials, JSP Examples ,JSP Hot Topics and JSP Interview Questions with answers
In this section we will cover basic JSP Tutorials concept with JSP Examples . You can develop JSP programming concept. R4R provide JSP Interview Questions with answers. We also cover JSP Languages study materials in easy way.
Posted By: Shashi     Posted Date:04.05.14

JSP Tutorials, JSP Examples ,JSP Hot Topics and JSP Interview Questions with answers
In this section we will cover basic JSP Tutorials concept with JSP Examples . You can develop JSP programming concept. R4R provide JSP Interview Questions with answers. We also cover JSP Languages study materials in easy way.
Posted By: Shashi     Posted Date:04.05.14

What Are Variables and Types of Operators

We cover here about C Variables and C Operators .We cover What is Variables ?  Operators in C Arithmetic operators like Addition ‘+’, Subtraction ’-’ , Multiplication ‘*’ , Division ’/’, Modulus ‘%’


Posted By: Shashi     Posted Date:02.12.14

Characters Types, Size in Bytes and Range

In this we give two tables for Characters Types, Size in Bytes and Range one for 16 bit system  and second is for 32 bit system. C Languages has data types :char  ,signed char ,unsigned char ,short ,unsigned short ,int ,unsigned int ,long ,unsigned long ,float ,double ,long double


Posted By: Shashi     Posted Date:02.12.14

Integers,float and characteristics

In this section we are going to cover about data types of C in more details .We cover data type and their size like Integers in C, Bytes required, Floats in C, Characters in C.


Posted By: Shashi     Posted Date:02.12.14

Sample of C program, Advantages and Disadvantages of C and Data Types

In this section we are covering about  a sample of C Program, Advantages Of C, Disadvantages of C and Data Types In C


Posted By: Shashi     Posted Date:02.12.14

Induction, Features and History of C

In this C Tutorial we will cover introduction of C, History Of C and Features of C in brief. We also covers some important points. We try to make this tutorial as easy as we can. We cover nearly almost all topics.


Posted By: Shashi     Posted Date:02.12.14

79 Points about C basics

79 Points about C Basics programming languages . We cover 79 important point about C languages .We explain c topics with examples .We cover all topics in very simple and very easy way with example.


Posted By: Shashi     Posted Date:02.12.14

Learn C in 7 days

There are 20 points of C  Programming Languages  .You can learn C  in 7 days. You just learn these 20 points C  Programming Languages. It will very helpful for interview purpose . We prepared a short note for you.


Posted By: Shashi     Posted Date:02.12.14

Basic C Tutorials with Examples

Basic C Tutorials with Examples, In this C Tutorials (Learn C in 15 days) we covers basic Induction of c, Features of C ,History of C, Sample of C program, C Advantages and Disadvantages ,C Data Types, Operators, Loops , Switch Statements with Examples. Arrays, Multidimensional Arrays Example of , Function, Register variables, Prototyping ,Preprocessor , Pointers in C With Example, Structure. Dynamic memory allocation .Allocating memory and use of calloc and malloc function.


Posted By: Shashi     Posted Date:02.10.14

C Basics Tutorial In Easy Way

We cover C Basics Tutorial In Easy Way. We cover basics about C, a First Program, a program computes a table of the sine function for angles between 0 and 360 degrees.
Data Types in C, Switch Case ,If Else, Loops in C, Operators in C, Auto ,Static, extern ,register
Posted By: Shashi     Posted Date:02.11.14

C Tutorial for Beginners

It is helpful C tutorial for those are new and want Learn C programming languages. In this section we will cover  C Tutorial for Beginners. We will cover brief about Basics of  C, C Data Types, Declaration of Storage Class, How you can start With C ,Identifiers and Keywords, Write a first C example program, Instructions in C Language, Functions and Pointer


Posted By: Shashi     Posted Date:02.11.14

C Programming Lagnuages with Examples
In this section we cover C Programming Fundamentals Introduction in only 4 topics. We cover overview of C Language with in these four topics. You can start C programming and get basics idea about C programming Language.
Posted By: Shashi     Posted Date:02.11.14

New Updates
Tutorials,examples and Interview Questions with answers
Posted By: Shashi     Posted Date:02.10.14

C# Tutorials,C# examples and C# Interview Questions with answers
R4R provide C# Tutorials,C# examples and C# Interview Questions with answers. Through R4R you can develop a small application and small programs.We cover C# Tutorials,C# examples and C# Interview Questions and answers for freshers as well experienced programmer.
Posted By: Shashi     Posted Date:11.17.13

Java/J2EE(Servlet,JSP,JNDI,Struts,Spring,Hibernate,EJB,JSF,JMS,Web-Services)
In this section R4R covers Java/J2EE(Servlet,JSP, JNDI, Struts, Spring, Hibernate, EJB,JSF,JMS,Web-Services) Tutorials with Examples.R4R provide Java/J2EE (Servlet,JSP, JNDI,Struts, Spring, Hibernate, EJB, JSF, JMS, Web-Services) Interview Questions with answers study materials for freshers and experienced.
Posted By: Shashi     Posted Date:11.13.13

CoreJava Tutorials , CoreJava Examples and CoreJava Interview Questions with answers
In this section R4R covers CoreJava Tutorials with CoreJava Examples. R4R covers CoreJava programming concept in easy way. R4R provide CoreJava Interview Questions with answers study materials for freshers and experienced.
Posted By: Shashi     Posted Date:11.04.13

Microsoft.net Technology ASP.NET,c# ,ADO.NET,WCF,WPF,Silverlight ,VB.net
R4R provides Microsoft Technologies(like ASP.NET,c# ,ADO.NET,WCF,WPF, Silverlight and VB.ne)Tutorials with Examples,programming concept and Interview Questions with answers study materials for freshers and experienced.
Posted By: Shashi     Posted Date:11.04.13

J2me Tutorials concept with Examples with Netbean IDE and J2ME Application Examples.
R4R cover basic J2me Tutorials concept with Examples and provide a way to develop J2me programming concept in easy way. R4R provide J2me Interview Questions with answers.R4R provide J2me Languages study materials with examples uing Netbean IDE and J2ME Application Examples.
Posted By: Shashi     Posted Date:10.30.13

J2me Tutorials concept with Examples ith netbean IDE and J2ME Application Examples.
R4R cover basic J2me Tutorials concept with Examples and provide a way to develop J2me programming concept in easy way. R4R provide J2me Interview Questions with answers.R4R provide J2me Languages study materials with examples uing Netbean IDE and J2ME Application Examples.
Posted By: Shashi     Posted Date:10.30.13

Java ebooks , Java tutorials , Java examples , Java interview questions and answers
R4R provides study materials for Java/j2EE technologies. R4R covers core java, advanced java, servlet, JSP, Struts, Spring, Hibernate, EJB, JSF, J2ME, ANT, JUnit and Some APIS .R4R also provides ebooks,tutorials,examples, interview questions and answers.
Posted By: Shashi     Posted Date:10.30.13

Learn basic C++ Tutorials with Examples , C++ Interview Questions with answers
R4R is a free E-learning website.You can learn basic C++ Tutorials with Examples , C++ Interview Questions with answers and also some hot topics.
Posted By: Shashi     Posted Date:10.30.13

C Tutorials with Example C subjective and objective interview questions and answers
R4R provide C Tutorials with Example and also provides C subjective and objective interview questions and answers.You can learn C in easy way.We cover basics of C here and give some examples.
Posted By: Shashi     Posted Date:10.30.13

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