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Converting a list to a JSON array is one of the common tasks in Java. Let's see how to convert a list to a JSON array in Java. If you do not know what JSON is, then you can read the JSON tutorial. The following are various ways to convert a list to a JSON array in Java: Manual construction of JSON array Using Jackson library Using Gson library Using org.json library Let's learn the process of each of them one by ... Read More
Let's see learn how to change a JSON object into a Java object using the Gson library. Gson is a tool made by Google for converting Java objects into JSON and back. JSON stands for JavaScript Object Notation. In the JSON format, data is stored in key-value pairs. Mainly, it is used for sharing data between a server and a web app. Gson is a Java tool that can turn Java objects into JSON and JSON back into Java objects. It is used by many developers because it is simple and easy. Why Convert JSON Object to Java Object? Here ... Read More
JSON is a data interchange format that is easy to read and write. It is lightweight and gets parsed easily. It is commonly used in web applications for sending and receiving data. To know more about JSON, refer to JSON. Pretty print is a type of formatting that formats data in a more easily readable way by adding indentation and line breaks. It is useful for debugging and logging purposes. Enabling pretty print Using Gson Library Gson is a JSON library for Java, which was created by Google. By using Gson, we can generate JSON and convert JSON to Java objects. ... Read More
Reversing a string means, moving first character to last, second character to second last and so on. In this article we will discuss how to reverse a string in place using C/C++ program. In the "in place" string reversing, we are not allowed take extra memory to store the string while running program. First of all, let's understand our problem statement:We are given a character string as input and we need to find and output the reverse string of the given string. For example: // Input : a character string "This is a string" //Output : Reverse of ... Read More
The probability density function (pdf) is a function that describes the relative likelihood for this random variable to take on a given value. It is also called as density of a continuous random variable. The probability of the random variable fall within a particular range of values is given by the integral of this variable's density over that range, So, it is given by the area under the density function but above the horizontal axis and between the lowest and greatest values of the range. Probability Distribution is based upon this probability density function. In this article, we will generate ... Read More
The middle-square method is one of the simplest methods of generating random numbers. This method will either begin repeatedly generating the same number or cycle to a previous number in the sequence and loop indefinitely. For a generator of n-digit random numbers, the period can be no longer than the specified n(number of digits). If the middle n digits are all zeroes, the generator then generates zeroes forever. In this article, we will implement a C++ program to generate ten 4-digits random number using the middle-square method. Steps for Middle-Square Random Number Generation The steps for generating random numbers ... Read More
An interface in Java is a specification of method prototypes. Whenever you need to guide the programmer or make a contract specifying how the methods and fields of a type should be, you can define an interface. When a class implements an interface, it should provide concrete implementations for all of its abstract methods. But is it possible to override only one method from an interface? Overriding a Method from an Interface In Java, all methods in an interface are abstract (unless declared as default or static). When a class implements an interface, it must override those abstract methods. No, ... Read More
Sorting a string alphabetically means rearranging its characters in order, from A to Z. For example, the string "java" becomes "aajv" after sorting. Different ways to sort a String Alphabetically There are two ways to do this in Java using different approaches - Using toCharArray() and Arrays.sort() Method Sorting the array manually Using toCharArray() and Arrays.sort() Method The toCharArray() method of this ... Read More
In Java, the collections framework provides various classes like ArrayList, HashSet, and LinkedList to store groups of elements. But once data is stored, how do you access or retrieve it? Java provides multiple ways to retrieve elements from collections, depending on whether you're reading values, modifying them during traversal, or iterating forward or backward. You can retrieve the elements of a collection in four ways- Using For-Loop Using For-Each Loop ... Read More
When working with collections in Java, you might need to convert an array to an ArrayList. This is useful because ArrayList offers more flexibility, such as dynamic sizing and built-in methods for adding, removing, and searching elements. Need for Converting an Array to an ArrayList Arrays in Java have a fixed size and provide limited functionality. ArrayList, on the other hand, is part of the Java Collections Framework and provides methods to modify data dynamically. It is useful when - Need to use dynamic Collections. ... Read More