Linked lists are a fundamental data structure used in computer science, and Java provides its own linked list implementation. However, there may be times when you want to create your own custom linked list. Implementing a custom generic linked list in Java can be a valuable learning experience and provide greater flexibility, performance, and an […]
Implementing a Custom Generic Linked List in Java Read More »
As you already know that Java provides us with its own LinkedList class and its various helper methods but what if you want to implement your own linked list class? With your own custom methods? Let’s see how you can achieve that. Let’s create a C, C++ type linked list, and we know that in
How to implement your own Linked List In Java w.r.t competitive coding Read More »
Earlier, we discussed how to connect with a remote server using Java, and this post will cover the points on how to execute commands on that remote server. We may have to execute single or multiple commands depending on the situation. We must remember that we don’t make an ssh connection again for each command
Execute commands on the remote server using Jsch in java Read More »
It is often required to filter records in the table based on some condition/s. To filter records using these conditions SQL WHERE clause is used. WHERE clause can be used in SELECT, UPDATE, DELETE, etc. statement. In this article, we will learn how to use the SQL WHERE clause in the SELECT statement. SQL WHERE
SQL DISTINCT keyword is used to retrieve unique ( distinct ) values from the table. If there are duplicate values present for a particular column, then SQL “distinct” keyword can be used to select only the distinct values. SQL DISTINCT Syntax where column1, column2, columnN are the column names of the table. In this post,
SQL DISTINCT keyword Read More »
SQL Select statement is used to retrieve data from the database. The data is returned in form of a table called a resultset. SQL SELECT Syntax In SQL select statement, we specify list of columns to be fetched from database tables. To select specific columns from table: column1, column2, columnN are the column names of
SQL SELECT statement Read More »
Method overloading is an oops concept where two methods have the same name but different parameters. In method overloading, we can have parameters that can match multiple overloaded methods. In this case, the compiler will select the most specific method and call it. But if there are two specific methods and the compiler cannot decide
Ambiguity for the null parameter in method overloading Read More »
Method overloading in java allows multiple methods to have the same name but with different numbers or types of parameters. Methods return type may or may not match. Example Return Type in Overloading In java method overloading, the return type of method is not considered. Only the number of arguments or their data types are
Method Overloading in Java Read More »
@JsonInclude annotation is used to exclude properties during object serialization. By default, all properties of a class are included during serialization. But by using the @JsonInclude annotation, we can exclude a few properties during serialization. This annotation can be applied at the field, method, or class levels. @JsonInclude annotation provides us with different options. A
@JsonInclude Jackson Annotation Read More »
This post will explain how to serialize/deserialize the java optional type field using Jackson. So, let’s first look at the problem, and then we will move on to its solution. We have created a Person model class with firstName as an Optional type field, and then we will serialize and deserialize it. Now, we will
Java Optional with Jackson Read More »