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Java Articles
Page 11 of 450
Importance of @Override annotation in Java?
What is an Annotation? An annotation is like metadata that provides additional information about the code. It does not affect the code directly but provides the information so that the compiler or runtime environment can use it while executing the code. To define or use any annotation in Java, you need to specify the annotation name starting with the "@" symbol. Here is the syntax to use annotations in Java: @annotation_name Where the @ symbol specifies the annotation, and annotation_name is the name of the annotation. Following is a list of a few important annotations and their usage: ...
Read MoreJava program to print left triangle star pattern
In this article, we will understand how to print the left triangle star pattern in Java. This pattern is also known as the Mirrored Right Triangle Star pattern. Below is a demonstration of the same- Input: Number of rows: 6 Output: * * * * * * * * * * * * * * * * * * * * * Printing Left Triangle Star Pattern Following are the ...
Read MoreJava program to find sum of N numbers using recursion
In this article, we will learn how to find the sum of N numbers using recursion in Java. Recursion is when a method calls itself repeatedly until a base condition is met. In Java, each recursive call is placed on the stack until the base case is reached, after which values are returned to calculate the result. To solve with recursion, we need to divide our problem into smaller chunks, then find out solution for that smaller part, and that will be our base condition. In this problem, to find the sum of N numbers using recursion, we can store ...
Read MoreJava program to find the product of two numbers using recursion
In this article, we will understand how to find the product of two numbers using recursion in Java. A recursive function is a function that calls itself multiple times until a particular condition is satisfied. Product of two Numbers Using Recursion Recursion is the process of repeating items in a self-similar way. In programming languages, if a program allows you to call a function inside the same function, then it is called a recursive call of the function. To find the product of two numbers, let's say a and b, using recursion, the base case will be (if y = 0, ...
Read MoreJava program to find sum of digits of a number using recursion
In this article, we will understand how to find the sum of the digits of a number using recursion in Java. A recursive function is a function that calls itself multiple times until a particular condition or base condition is met. In programming languages, if a program allows you to call a function inside the same function, then it is called a recursive call of the function. Problem Statement Write a program in Java to find the sum of the digits of a number using recursion. Below is a demonstration of the same. Input Enter the number : 12131415 ...
Read MoreJava program to calculate the power using recursion
To calculate the power of a number, Java provides different ways to do this using loops, built-in methods, and recursion. In this article, we will learn how to calculate the power of a number using recursion. In Java, Recursion is a process in which a function calls itself multiple times until it reaches a base condition, and the corresponding function is called a recursive function. Problem Statement Given a base number and a power value, we need to calculate the result of raising the base to the power using recursion. Below is a demonstration of the same. Input: Enter ...
Read MoreJava Program to Check if a set is the subset of another set
In this article, we will understand how to check if a Set is a subset of another set. A Set is a Collection that cannot contain duplicate elements. It models the mathematical set abstraction. The Set interface contains only methods inherited from Collection and adds the restriction that duplicate elements are not allowed. Following are the ways to check if a set is a subset of another set: Using containsAll() Method Using Stream API Using containsAll() Method In Java, the set interface has a method called containsAll() that checks ...
Read MoreJava Program to Pass ArrayList as the function argument
The ArrayList is a resizable array, which is part of java.util package. The difference between a built-in array and an ArrayList in Java is that the size of an array cannot be modified. In this article, we will understand how to pass an ArrayList as a function argument. Following are the ways to pass an ArrayList as a function argument: Using Function Argument Using Return Type Using Function Argument We can pass an ArrayList as a function argument in Java. The function can take an ArrayList as a parameter and perform operations ...
Read MoreJava Program to Convert the local Time to GMT
In this article, we will learn how to convert the local time to GMT (Greenwich Mean Time) in Java. We need this conversion when we want to standardize time across different time zones or when working with systems that require GMT. We will cover the following methods to convert local time to GMT: Using ZonedDateTime class Using Calendar Class Using Date Class Using ZonedDateTime Class ZonedDateTime class was introduced in Java 8, which is used for converting local time to GMT. We can use the ...
Read MoreJava program to detect loop in a LinkedList
What is a LinkedList? A Linked list is a sequence of data structures where each node contains two parts as follows - Data: The value or information stored in the node. Next: A reference (or pointer) to the next node in the sequence. Detecting a Loop in a LinkedList A loop or cycle means that the last node of a linked list is connected back to one of the nodes earlier in the list, creating a cycle. Or, the next pointer of a node points to itself. The following are the ways ...
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