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Articles on Trending Technologies
Technical articles with clear explanations and examples
How can we serialize a list of objects using flexjson in Java?
The Flexjson is a lightweight library for serializing and deserializing Java objects into and from JSON format. We can serialize a list of objects using the serialize() method of JSONSerializer class. This method can perform a shallow serialization of the target instance. We need to pass a list of objects of List type as an argument to the serialize() method.Syntaxpublic String serialize(Object target)Exampleimport flexjson.JSONSerializer; import java.util.*; public class JsonSerializeListTest { public static void main(String[] args) { JSONSerializer serializer = new JSONSerializer().prettyPrint(true); // pretty print JSON Student s1 = new Student("Raja", "Ramesh", 28, "Hyderabad"); Student s2 = new Student("Suresh", "Kumar", 30, "Chennai"); ...
Read MoreWhen can we call @JsonAnyGetter and @JsonAnySetter annotations in Java?\\n
The @JsonAnyGetter annotation enables to use a Map as a container for properties that we want to serialize to JSON and @JsonAnySetter annotation instructs Jackson to call the same setter method for all unrecognized fields in the JSON object, which means that all fields that are not already mapped to a property or setter method in the Java object.Syntaxpublic @interface JsonAnyGetter public @interface JsonAnyGetterExampleimport java.io.*; import java.util.*; import com.fasterxml.jackson.core.*; import com.fasterxml.jackson.databind.*; import com.fasterxml.jackson.annotation.*; public class JsonAnyGetterAndJsonAnySetterTest { public static void main(String args[]) throws JsonGenerationException, JsonMappingException, IOException { Employee emp1 = new Employee(); emp1.setFirstName("Adithya"); emp1.setLastName("Sai"); ...
Read MoreConvert CSV to JSON using the Jackson library in Java?\\n
A Jackson is a Java JSON API that provides several different ways to work with JSON. We can convert CSV data to JSON data using the CsvMapper class, it is specialized ObjectMapper, with extended functionality to produce CsvSchema instances out of POJOs. We can use the reader() method for constructing ObjectReader with default settings. In order to convert this, we need to import the com.fasterxml.jackson.dataformat.csv package.In the below example, convert a CSV to JSON.Exampleimport java.io.*; import java.util.*; import com.fasterxml.jackson.databind.*; import com.fasterxml.jackson.dataformat.csv.*; public class CsvToJsonTest { public static void main(String args[]) throws Exception { File input = new File("input.csv"); try { ...
Read MoreCSS rest Speech Media property
The rest property is a shorthand property for rest-before and rest-after properties. Set a pause before or after the element.The following is the syntax:rest: rest-before rest-afterHere,rest-before: Rest for some seconds beforerest-after: Rest for some seconds afterExampleThe following is an example of rest speech media property:h1 { rest: 15ms 20ms; }
Read MorePerform Animation on CSS line-height property
To implement animation on line-height property with CSS, you can try to run the following code −ExampleLive Demo p { animation: mymove 3s infinite; line-height: 20px; } @keyframes mymove { 70% { line-height: 50px; } } This is demo text! This is demo text! This is demo text! This is demo text! This is demo text! This is demo text! This is demo text! This is demo text! This is demo text! This is demo text! This is demo text! This is demo text!
Read MoreHow to detect if a MySQL database structure changed (not content)?
Let us first see an example and create a table −mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(40), StudentAge int, StudentMarks int ); Query OK, 0 rows affected (0.76 sec)Following is the query to know the database structure −mysql> show create table DemoTable;This will produce the following output −+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Table | Create Table ...
Read MoreHow to deserialize a JSON array to list generic type in Java?\\n
The Gson library provides a class called com.google.gson.reflect.TypeToken to store generic types by creating a Gson TypeToken class and pass the class type. Using this type, Gson can able to know the class passed in the generic class.Syntaxpublic class TypeToken extends ObjectWe can deserialize a JSON array to a generic type of list in the below exampleExampleimport java.lang.reflect.Type; import java.util.*; import com.google.gson.*; import com.google.gson.reflect.*; public class JSONArrayToListTest { public static void main(String args[]) throws Exception { String jsonStr = "[{\"name\":\"Adithya\", \"course\":\"Java\"}, " + "{\"name\":\"Ravi\", \"course\":\"Python\"}]"; Type listType = new TypeToken() {}.getType(); List students = ...
Read MoreCSS grid-area Property
Set the grid-row-start, grid-column-start, grid-row-end and the grid-column-end properties using the grid-area property.ExampleYou can try to run the following code to implement the CSS grid-area property.LIve Demo .container { display: grid; background-color: green; grid-template-columns: auto auto; padding: 20px; grid-gap: 10px; } .container > div { background-color: orange; text-align: center; padding: 10px 0; font-size: 20px; } .ele1 { grid-area: 1 / 2 / 2 / 5; } Game Board 1 2 3 4 5 6
Read MoreSet the flex items horizontally with CSS
Use the flex-direction property with row value to set the flex-items horizontally.ExampleYou can try to run the following code to implement the row value −Live Demo .mycontainer { display: flex; flex-direction: row; background-color: #2C3E50; } .mycontainer > div { background-color: #F7F9F9; text-align: center; line-height: 40px; font-size: 25px; width: 100px; margin: 5px; } Quiz Q1 Q2 Q3 Q4 Q5 Q6
Read MoreWrap the flex items in reverse order with CSS
Use the flex-wrap property with wrap-reverse value to wrap flex-items in reverse order.ExampleYou can try to run the following code to implement the wrap-reverse valueLive Demo .mycontainer { display: flex; background-color: #D35400; flex-wrap: wrap-reverse; } .mycontainer > div { background-color: white; text-align: center; line-height: 40px; font-size: 25px; width: 100px; margin: 5px; } Quiz Ans1 Ans2 Ans3 Ans4 Ans5 Ans6 Ans7 Ans8 Ans9
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