Sort an integer array using selection sort algorithm in java (with example)
What is selection sort algorithm? Selection sort is sorting technique used to sort the elements in list data structure like array. […]
Sort integer array using bubble sort algorithm in java (example)
Given an unsorted array in java. Sort the given input array using bubble sort algorithm. Bubble sort is a sorting
Classify or segregate array containing even & odd numbers in java (example)
Given an array containing even and odd number in java. We would like to classify the even and odd numbers.
Sort an integer array containing 0 & 1 in java (example)
Given an integer array containing 0 and 1. We would like to sort input array. Zeros will be left end
Check if array contains duplicate elements using java (example)
Problem Statement: Given an array of integer, we would like to find out, whether array contains any duplicate elements. The
Convert object having date to/from JSON in java (Jackson ObjectMapper example)
Given the user defined object or POJO having date field, we would like to serialize the POJO to JSON. During serialization, we
Convert list of objects to/from JSON in java (jackson objectmapper/ example)
Given a list of user defined objects, we would like to convert list of pojo objects to JSON (and JSON to list
Convert Array of Objects to / from JSON – Jackson ObjectMapper
Given an array of user defined objects, we would like to convert array of object to JSON and JSON to array
Convert Map to/from JSON string in java (jackson objectmapper/ example)
Given Map of String & object (Map<String,Object>), we would like to convert Map to/from JSON. We will use the jackson’s objectmapper to serialize
Convert object to/from json string in java (jackson objectmapper-example)
Given user defined object in java. Serialize deserialize POJO to JSON string – jackson objectmapper i.e. convert data members of object to json string.
Convert list of objects to /from map in java 8 lambda stream (example)
Given the list of objects, convert list of objects to map. We will use lambda streams to convert list objects
Initialize & loop one, two, three dimensional array in java (example)
Initialize One, Two & Three dimensional array in java. Create & print or loop/iterate static & dynamic multi-dimensional array in java (example).
Date serialization & deserialization – POJO to JSON (GSON & example)
Given the user defined object or POJO, having Date field, we would like to serialize the POJO to JSON. During serialization, we would
Serialize/ convert list of objects to/from json in java (Gson & example)
Given an list of user defined objects, we would like to convert list of pojo objects to JSON (and JSON to list
Convert /Serialize array of objects to / from json in java (Gson /example)
Given an array of user defined objects , we need to convert array of POJOs to JSON String. Also, we will convert
Serialize /Convert Map of object to/from JSON in java (GSON /example)
Given the Map of String and object (Map<String,Object>), we would like to convert Map to JSON and vice versa. We will use the
Read a file line by line using java 8 lambda stream (example)
1. Read file using java 8 lambda stream Given a file, read input file by line by line using lambda
Impact of interface’s default method on multiple inheritance (Java 8 /example)
Java 8 has introduced default method for interfaces, which provides the default implementation of method. Prior to java 8 interfaces
Java 8 Functional interface explained with examples (Comparator)
1. What is functional interface in java8? The interface having one abstract method is called functional interface. The interface can
Create runnable task using functional interface – java8 lambda stream (example)
1. Functional Interface java 8: The interface having one abstract method is called the functional interface. E.g. Comparator, Runnable interface.
Serialization & Deserialization object in java using externalizable interface.
Given user defined object or POJO, we would like to serialize object in java. We will use Externalizable interface, so that
Find maximum & minimum element in array (java / example)
Given an array of integers , find out maximum & minimum number in array using linear search. e.g. input array is { 50,
Find/search element in sorted integer array (java/binary search algorithm/iterative)
Given sorted integer array in java. Find or search element/integer in an array using binary search algorithm (with example). Binary
Find element in an array using binary search algorithm in java (recursive)
Binary search is a divide and conquer algorithm. Divide and conquer algorithm is process of dividing the input data-set after
Logging aspect in RESTful web service – spring aop (log requests/responses)
RESTFul web service using spring AOP log request,response information. Create PointCut expression Before, After, Around in REST Web Service.
What is aspect oriented programming (aop) in spring (examples) ?
Aspect Oriented programming in spring The aspect oriented programming (aop) is very important module of spring framework. As the nomenclature
Create custom thread pool in java without executor framework (example)
Custom thread pool implementation in java example without executor framework. Create thread class & thread pool using blocking queue (example)
Multipart file upload RESTFul web service (Spring MVC/ java/ example)
File upload is very common scenario in today’s web application. In this post, We will discuss about RESTFul web service exposing
What is filter in enterprise applications (java/ example)-Real world analogy
What is Filter in real world ? The literal meaning of Filter “a porous device for removing impurities or solid
Impact of Inheritance on serialization example in java (Concrete class serializable)
Given a base & concrete class in java. Base class is not Serializable Concrete class implements Serializable interface and extending