Problem Statement “Minimum swaps to make sequences increasing” states that you are given two arrays a[ ] and b[ ] of the same size n. Swap the elements of the array a with array b to make both arrays strictly increasing. You can swap elements at the same indexes only …
This tutorial will help you understand various methods on how to compare two characters in Java along with detailed examples. Java supports various built-in methods like compare() and equals() methods to compare various characters. We can compare both primitive characters and Character objects. Let us see each method in detail …
This tutorial will help you understand the different ways on how to stop a loop in Java with examples. What is a loop? A loop is a type of control structure that helps us to execute a code multiple times until it meets a certain condition. There are different types …
This tutorial will help you understand how to append a string in Java using different methods and string concatenation with examples. String concatenation means appending two or more strings together to form a single string. The term append denotes to include an extra string to the existing string variable. For …
In this tutorial, we will discuss Atomic in Java, its operations, classes, and variables with detailed examples. Atomic in Java Atomic in Java is a very important concept in a multithreading environment. It is one of the concurrent utilities that ensure multiple threads use the shared resources effectively without leading …
Sorting is an important concept in arrays. In this tutorial, we will see various methods on how to sort an array in Java with examples. Sorting is a technique to arrange the elements in either ascending or descending order based on numbers or alphabets. Ascending order denotes sorting elements starting …
In some situations, while executing a Java program from the command prompt, we may face the error “Could not find or load main class”. This occurs mainly when the JVM fails to find the main class or .class file. Whenever we compile a Java code, the compiler will automatically create …
In this tutorial, we will understand the differences between C++ and Java along with similarities in C++ vs Java with example. Both are object-oriented programming languages. What is C++? C++ is a programming language that is derived from C. Earlier C++ also had the name “C with classes”. This is …
In this tutorial, we will understand Semaphore in Java, its constructors and methods, and lock implementation using detailed examples. Java Semaphore Semaphore is one of the techniques that implement thread synchronization. The main use of a semaphore is to control access to a shared resource using a counter variable. Using …
In this article, we will read ConcurrentMap in Java. Java ConcurrentMap interface ConcurrentMap interface in Java is a synchronized map that allows more than one thread to access the map. It is thread-safe and doe not affect the consistency of the map elements. It is part of the java.util.concurrent package …