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Articles on Trending Technologies
Technical articles with clear explanations and examples
Java Program to Check if a given Class is an Anonymous Class
The type of nested class that has no name is called an anonymous class. Before diving into a Java program to check if a given class is an anonymous class, we need to understand what is a nested class. Let's discuss this in detail. What is a Java Nested Class? A class created within another class in Java is called a nested class. We know that we cannot declare a Java class private, but we can define a nested class as private. There are two types of nested classes in Java: static and non-static. The static nested class is defined ...
Read MoreJava Program to Add the data from the Specified Collection in the Current Collection
In Java, a collection is an object that allows us to group several numbers of objects as a single unit. The Collection interface is the root of the collection framework. We can perform various operations on collection like adding, removing, iterating, searching and retrieving objects. In this article, we will discuss Java programs to add data from the specified collection to the current collection with the help of addAll() method. Using addAll() method of Collection Interface The addAll() method of Collection interface adds data from a specified collection into current collection. It returns a boolean value, which is TRUE if the ...
Read MoreJava Program to Check Array Bounds while inputting Elements into the Array
Array is a linear data structure that is used to store a group of elements with similar data types. It stores data in a sequential manner. Once we create an array, we can't change its size, i.e., it is of fixed length. This article will help you to understand the basic concept of arrays and array bounds in Java. Also, we will discuss Java programs to check array bounds while inputting elements into the array. Array and Array Bound We can access elements of an array by its index. Suppose we have an array of length N, then ...
Read MoreJava Program to Access all Data as Object Array
Array is a linear data structure that is used to store a group of elements with the same data type. We can create an array with primitive datatypes, and since a class is considered a user-defined datatype in Java, it is also possible to create an array of objects. In this article, we are going to discuss object arrays. First of all, let's discuss what is an object array, in Java. What is Object array or Array of Objects An array of objects contains reference variables of objects.We follow the same syntax to create an array of primitives and an array ...
Read MoreJava Program for Rotate the Matrix Right by K times
Array is a linear data structure that is used to store a group of elements with similar data types. It stores data in a sequential manner. When we create an array of two dimensions, i.e., rows and columns, we call it a matrix. In this article, we will create a matrix of M x N and try to rotate it right by K times. Here, M and N are the size of the row and column, respectively. K is the number of times we want to rotate the matrix. Example Scenarios Let's understand what matrix rotation is with the following ...
Read MoreJava Program for Int to Char Conversion
The given task is to write a Java program that converts an integer into a character. The int and char are primitive datatypes of Java. The int is a 32-bit signed datatype used to store whole numbers, and char holds 16-bit unsigned Unicode characters. The int and char keywords are used to declare an integer variable and a character variable, respectively. We store character variables in a single quotation (' '). Example Scenario To understand the problem statement, let's see an example scenario: Input: int num1 = 83; Output: ch = 'S' Here, num1 is the name of a ...
Read MoreJava public static void main(String[] args)
The Java program starts execution when the JVM calls the main() method. A Java application begins with this method. Without a main() method, a Java file will compile successfully because at compile time, the compiler doesn't check for a main method, but at run time JVM checks whether the main() method is available or not. Therefore, we will get an exception at run time. In this article, we will understand why we follow the convention "public static void main(String[] args)." The Syntax of a basic Java program looks like: public class class_name { // This line must be ...
Read MoreJava Program to Calculate difference between two Time Periods
We are given two time periods, and our task is to write a Java program to calculate the difference between them. For this problem, we can use classes and methods of java.time, java.util, and java.text packages. SimpleDateFormat class Date class LocalDate class Period class parse() method between() method As we move further in this article, we will understand the uses of these classes and methods in calculating the difference between two time periods. Some examples ...
Read MoreJava Program to Check Whether a Number can be Expressed as Sum of Two Prime Numbers
The given task is to write a Java program to check if an integer can be expressed as the sum of two prime numbers. A number is said to be a prime if it has only two factors, which are 1 and itself, and cannot be divided by any other number. Some examples of prime numbers are 2, 3, 5, 7, 11, 13, and so on. 2 is the only even prime number; all other prime numbers are odd numbers. Example Scenario Let's understand the problem with an example. The possible solution is 43 = 2 + 41. Here, 2 and ...
Read MoreReverse Words in a String in C++
In this article, we have a string. Our task is to reverse the words in the given string. Here is an example of reversing the words of a string: Example The example below reverses the words of the given string: Input: "I am Viper" Output: Viper am I Here are the approaches to reverse the words of a string: Using Two Pointer Approach Using STL reverse() Function Using stringstream with Vector Using Recursive Approach ...
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