Mar 20, 2021

SOLID Principles explained with coding examples

In software development world, as our application gets larger there is a very high risk of getting our program messy. Every programmer knows what it takes to deal with messy and spaghetti code in terms of adding new features and fixing bugs. S.O.L.I.D principles is a guideline to write clean…

2 min read

Nov 19, 2020

Internal Mechanism of equals(), hashCode() and HashMap in Java

In Java equals() and hashCode() methods is defined in Object class. That means all the classes in Java by default have them. equals() method The default implementation for equals() method looks like this public boolean equals(Object obj) { return (this == obj); } As we can see the default implementation for equals()…

Java

3 min read

Nov 8, 2020

Sorting objects in Java

In java for sorting object using data members, there are two interfaces Comparable Comparator Comparable Comparable<T> interface present in java.lang package. It has only one method compareTo(). A Comparable object is used to compare itself with other homogenous objects. …

Java

2 min read

Nov 7, 2020

Understanding Functional Interfaces in JAVA

With the release of JAVA 1.8, it introduces functional programming through lambda expression. Functional Interface is a big part of lambda expression in JAVA because we cannot achieve functional programming without implementing a functional interface. What is a Functional Interface? Functional interfaces are those interfaces that have only one abstract method in it. It may…

Java

3 min read

Nov 3, 2020

Generics in JAVA

Generics is one of the most important and hard to wrap head around features of the Java programming language. It was introduced in Java 1.5 version. What is Generics? Generally, a java class can take any type of Object. With generic, we can make a java Class, Interface, and method type-specific. Benefits of Generics Generics provide…

Java

4 min read

Oct 30, 2020

Can we override a static method in Java?

In Java, we can declare a method with the same signature as it’s parent class. In another word, it’s called method overriding. But when it comes to the static method we, in fact, can do the same but it’s not called method overriding but method hiding. As we all know…

1 min read

Can we override a static method in Java?

Can we override a static method in Java?

Oct 26, 2020

What is Enum and how to use it properly?

While writing program there are times when we need to define a group of constants. In java, we can use Enum to define a group of constants. Enum came into the picture with JDK 1.5. Features of enum It is a special data type like class and interface to define a group of…

2 min read

What is Enum and how to use it properly?

What is Enum and how to use it properly?

While writing program there are times when we need to define a group of constants. In java, we can use Enum to define a group of constants. Enum came into the picture with JDK 1.5.

Features of enum

It is a special data type like class and interface to define a group of…

Oct 23, 2020

Encapsulation is not meant for data hiding

While defining encapsulation many will refer that encapsulation is, Wrapping the data and the functionality and representing it as a single entity Hiding the data members to achieve security Well, although for encapsulation no. 1 is true the no. 2 is not always true. Let’s see why. Employee.java public class…

Java

2 min read

Encapsulation is not meant for data hiding

SOLID Principles explained with coding examples

Internal Mechanism of equals(), hashCode() and HashMap in Java

Sorting objects in Java

Understanding Functional Interfaces in JAVA

Generics in JAVA

Can we override a static method in Java?

Can we override a static method in Java?

What is Enum and how to use it properly?

What is Enum and how to use it properly?

Features of enum

Encapsulation is not meant for data hiding

Rony Emrul