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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to access the JSON fields, arrays and nested objects of JsonNode in Java?
What are JSON and JsonNode? JSON is a format that is used to store data and exchange data between a server and a client. To know more about JSON, you can refer to the JSON Tutorial. A JsonNode is Jackson's tree model for JSON. To read JSON into a JsonNode with Jackson by creating an ObjectMapper instance and call the readValue() method. We can access a field, array or nested object using the get() method of the JsonNode class. We can return a valid string representation using the asText() method and ...
Read MoreC++ Program to Calculate Average of Numbers Using Arrays
An array stores multiple values of the same data type. To find the average, we add all the numbers and then divide the total by how many numbers there are. In this article, we'll show you how to write a C++ program to calculate the average of numbers using an array. For example, if we have the numbers 40, 80, 10, 75, and 25, their total is 230, and the average is 230 / 5 = 46. Approaches for Calculating Average Using Arrays In C++, we can calculate the average of numbers in an array in two main ...
Read MoreC++ Program to Check Leap Year
A leap year contains one additional day, i.e february 29, to keep the calendar year synchronized with the earth's orbit around the sun. We will write a C++ program that checks whether a given year is a leap year or not. A year that is divisible by 4 is known as a leap year. However, years divisible by 100 are not leap years while those divisible by 400 are. Here is a list of some leap years and non-leap years: ...
Read MoreC++ Program to Generate Multiplication Table
In this article, we will show you how to write a C++ program to generate the multiplication table of a number. A multiplication table shows how a number is multiplied by 1 to 10 and helps define the multiplication operation for that number. Each row displays the result of multiplying the number by values from 1 to 10. For example, the multiplication table of 4 looks like this: 4 * 1 = 4 4 * 2 = 8 4 * 3 = 12 4 * 4 = 16 4 * 5 ...
Read MoreC++ Program to Display Factors of a Number
A factor is a number that divides a given number completely without leaving a remainder. In this article, we'll show you how to display all the factors of a number using different methods in C++. For example, the factors of 12 are 1, 2, 3, 4, 6, and 12. In this article, we will look at two ways to find and display the factors of a number: Basic Iterative Approach Optimized Square Root Approach Factors of a Number Using Iterative (Basic) Approach In this approach, we use loop to go ...
Read MoreC++ Program to Check Whether a Number is Prime or Not
A prime number is a whole number greater than one and the only factors of a prime number should be one and itself. For example, 2, 3, 5, 7, and 11 are prime numbers. Our task is to write a C++ program that checks if a given number is prime or not. We will cover different approaches to solve this problem. We'll cover the following methods for checking whether a number is prime or not: Using a Simple Loop Using the Square Root Method Using ...
Read MoreC++ Program To Convert Decimal Number to Binary
In a computer system, the binary number is expressed in the binary numeral system while the decimal number is in the decimal numeral system. The binary number is in base 2 while the decimal number is in base 10. Examples of decimal numbers and their corresponding binary numbers are as follows: Decimal Number ...
Read MoreHow to serialize a null field using Gson library in Java?
Gson is a library in the Java that is mainly used for converting Java objects to JSON and vice versa. By default, the Gson object does not serialize the fields with null values to JSON. If a field in a Java object is null, Gson excludes it.Serializing a Null Field Using Gson We can force Gson to serialize null values via the GsonBuilder class. We need to call the serializeNulls() method on the GsonBuilder instance before creating the Gson object. Once serializeNulls() has been called, the Gson instance created by the GsonBuilder can include null fields in the serialized JSON. ...
Read MoreHow to deserialize a JSON into an existing object in Java?
Deserialization is the process of converting a JSON string into a Java object. In this example, we will learn how to deserialize a JSON string into an existing object in Java. There are libraries available in Java that can help us to deserialize a JSON string into an existing object. Some of the popular libraries are: Using Gson Using Jackson Using Flexjson Let's learn how to use each of these libraries to deserialize a JSON string into an existing object in Java. Deserializing JSON Object Using ...
Read MoreDifferences between fromJson() and toJson() methods of Gson in Java?
Gson is a Java library which is developed by Google and used to convert Java objects into JSON and vice versa. It is mostly used in applications where data can be exchanged in JSON format. There are two useful methods in Gson that we are going to discuss in this article. These methods are fromJson() and toJson(). The fromJson() Method The fromJson() method is used to convert a JSON string into a Java object. It takes two parameters: the JSON string and the class type of the object you want to create. Here is the syntax of the fromJson() method: ...
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