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 […]
Core Java
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
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
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)
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
Impact of Inheritance on serialization example in java (Base class is serializable)
Given a base & concrete class in java. Base class is Serializable (implements Serializable interface). Concrete class is extending the
Impact of static & transient data member on serialization in java (example)
Serialization is the process of saving the objects loaded in the memory to corresponding streams. e.g Save the objects to
Convert/ Serialize Object /POJO to /from JSON String in java (Gson & example)
Given a user defined object, we would like to convert Object( or POJO) to JSON and vice versa. We will use the Google gson
Find object from arraylist of objects using lambda stream java 8 (example)
Given the arraylist of user defined objects or POJO (let we have person class). List <Person> personList Find or Search
Find/ search String object from arraylist collection of objects – stream lambda java 8 (example)
Given an arraylist collection of String objects, We would like to find object from arraylist. We will iterate through the list of
Program to calculate execution time of code/ functional block in java
Given the code or functional block of program , we would like to find elapsed time, to execute the code
Sort objects on multiple fields /properties – Comparator interface (lambda stream java 8)
Given a the list of objects, we need to sort the objects by their multiple properties. We have used java 8 streams to sort the objects. In below example, we have take the Person object. We will sort the list of person objects by their firstName. Also we have shown the cascaded sorting wherein we have sorted the list on multiple fields.We have performed the following operations.
Filter/Remove null & empty string from array – lambda stream java8 (example)
Given the strings of array containing nulls and empty string. We will be using Java 8 streams to filter out null and empty string in strings of array. Let us take a complete example to filter out null and empty string
Filter/remove null element/String from arraylist of objects – lambda stream java8 (example)
Suppose we are given the List collection containing the String values, we will remove the null values from list collections using filter of Java 8. Let us take a look into the below example
Convert one/ heterogeneous object into another – stream lambda (java8 /example)
Generally in our application we need to convert one object into another type. We can not directly transform one object to another. In traditional way we need to iterate source object and convert to destination object. We will be using Java 8 lamdas to translate one object into another.
Join or combine two / multiple Strings using StringJoiner in java8 (example)
Java 8 have StringJoiner class which will be used to join strings using delimiter. Also we can combine strings using prefix and suffix strings.
Create/Implement thread/ task using runnable interface & thread class (java/ example)
We have already discussed about the basics of Threads in java. Now we will discuss about creation process in java.
How we can create threads in java
Extending a class
Implementing a interface:
What is serialization & deserialization process in java (example)
1. Background of Serialization & Deserialization process: Before we start our discussion about the Serialization and Deserialization, We will discuss
Create single thread pool using executor in java (with example)
Thread Pool : Thread pool is collection of threads which are created to complete certain tasks.
The interaction between thread pool and task is as follows
1.) Thread Pool is created
2.) Task are created.
3.) Task assigned to Thread in thread pool.
Create fixed thread pool in java using Executors (example)
Thread Pool : Thread pool is collection of threads which are created to complete certain tasks.
The interaction between thread pool and task is as follows
1.) Thread Pool is created
2.) Task are created.
3.) Task assigned to Thread in thread pool.
What is thread in java with example (Real world analogy) ?
Everybody in this world is performing one duty or the other.The duties we are performs is like the functional activity of bigger execution block. Let us shrink our vision and take one house to understand. In traditional family environment husband involves in earning to maintain day to day expenses and wife involves in house hold activitie
What is client server architecture with example (real world analogy) ?
The person or device that is capable of serving is called the Server. In our day to day life we come across various servers. We generally purchase vegetable or fruits from a vendor (Shopkeeper / hawker). We request the shopkeeper for required vegetables/fruits. The shop keeper provides us the required vegetable or fruits. We ask the shopkeeper and he provides us the food items. So, Shopkeeper is at our service, which fulfills our need.