Month: April 2023

To convert an ArrayList to an array in Java, you can use the toArray() method of the ArrayList class. Here's an example: import java.util.ArrayList; public class ArrayListToArrayExample { public static…

A palindrome is a word, phrase, number or other sequence of characters that reads the same backward as forward. Here is an example of how to check if a string…

In Java, an abstract class is a class that cannot be instantiated on its own and is intended to be extended by subclasses. It can contain both concrete and abstract…

In Java, you can convert a char to an int using the (int) casting operator. When you cast a char to an int, the ASCII value of the char is…

An Armstrong number is a number that is equal to the sum of its own digits raised to the power of the number of digits. For example, 153 is an…

In Java, the keyword "static" is used to declare a variable, method or block that belongs to a class and not to an instance of the class. The static keyword…

In Java, a wrapper class is a class that provides a way to represent primitive data types (int, char, boolean, etc.) as objects. The Java language specification requires that every…