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Programming Articles
Page 1618 of 2547
What are new methods have added to the Arrays class in Java 9?
In this article, we will learn about the new methods that have been added to the Arrays class in Java 9. First, we will learn about arrays, and then the new methods added to the equals(), compare(), and mismatch() methods with examples. Arrays Java provides a data structure called the Array, and they are used to store multiple values of the same datatype in a single variable. The Arrays class can contain various methods for manipulating arrays and also contains static factory methods that allow arrays to view as a list. Creating an instance of an Array with a variable ...
Read MoreWhat are the useful commands in JShell in Java 9?
In this article, we will learn about useful commands in JShell. Java 9 has introduced a new interactive tool called JShell. This tool can be used to execute, test user-friendly and easy way of Java classes, interfaces, enums, objects, statements and etc. Different Useful Commands in JShell Below are some of the important commands in JShell: /open /var /types /methods /list /help /open To execute a script after JShell has started, we will use ...
Read MoreHow to define expressions, variables, and methods in JShell in Java 9?
JShell is a Read-Evaluate-Print Loop (REPL) that evaluates declarations, statements, and expressions as we have entered and immediately shows the results. This tool is run from the command prompt. Below, we can define expressions, variables, and methods in JShell. Expression The combination of variables, operators, and methods is known as an Expression in Java. They perform some logic that evaluates to a single value. int a=5, b=10, c=0; c=a+b; Here, "a+b" is an expression that evaluates the value of c as 15. Expression in JShell We can type any valid Java expression in JShell. The expression ...
Read MoreWhat is the use of the Cleaner class in Java 9?
In this article, we will learn about the use of the Cleaner class in Java 9. Below, we will first tell the basic usage and then we will know how we can use the Cleaner method practically. Garbage Collector An Object that has been created during the program execution is automatically removed by the Garbage Collector (GC). When an object not referenced by any thread and when JVM determines that this object can't be accessed, then it can be eligible for garbage collection. The finalize() method The Object class has a finalize() method, which is automatically called by GC before it attempts to remove the ...
Read MoreHow to save, edit, and drop a snippet in JShell in Java 9?
Java Shell or JShell is an official REPL(Read-Evaluate-Print-Loop) introduced with Java 9. It provides an interactive shell for quickly prototyping, debugging and without the need for the main() method or the need to compile the code before executing it. JShell is easily started by typing "jshell" in the command prompt. What are Snippets? JShell allows the execution of Java statements, variables, methods, class definitions, imports, and expressions. These pieces of Java code are referred to as snippets. Every snippet is assigned an ID(unique) that we can use later to reference it. Example Below is an example to represent a snippet ...
Read MoreWhen to use the ofNullable() method of Stream in Java 9?
In this article, we will learn to use the ofNullable() method of Stream in Java 9. We will first go through the Stream class, after that we will learn about the ofNullable() method along with its syntax and real-world use cases. Stream Class Stream was introduced in Java 8, the Stream API is used to process collections of objects. It represents a sequence of elements that support various operations to perform computations in parallel. Creating an instance of a stream: Stream stream; A stream is not a type of data structure, it takes input from Collections, Arrays, etc. The ofNullable() ...
Read MoreHow To Get the Arc Length from Given Angle in Java?
An arc of a circle is a segment or portion of the circumference of a circle. In other words, a curve between a pair of distinct points. The length of the arc refers to the length between two points along the arc (two points along a section of a circle or curve). It is a percentage of the circumference of the circle. When two lines intersect each other, the common meeting point is called a vertex and the geometrical figure between the two arms/lines is called an angle. Following diagram will help you to understand the arc and its length: ...
Read MoreC++ Program to Solve the Dominating Set Problem
In this article, we will explain the dominating set problem and implement it's solution in C++. First of all, let's understand what a dominating set is. Dominating Set of a Graph A dominating set for a graph is a subset of the set of all the vertices. Every vertex that is not in the dominating set should be adjacent of at least one vertex in the dominating set. To understand this clearly, consider the following graph: In the above graph, the set of vertices {B, D} is one of the dominating sets, because: ...
Read MoreC++ Program to Generate a Random Subset by Coin Flipping
The subsets of a set refers to all the possible combinations of choosing elements from the set. For example, if we have a set {1, 2}, the subsets are {}, {1}, {2}, and {1, 2}. In this article, we will learn how to generate a random subset for a set using coin flipping technique in C++. // Set of elements int arr[] = {1, 2, 3}; // Subsets of the above set {}, {1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}, {1, 2, 3} Coin Flipping Technique The coin flipping technique is a simple way ...
Read MoreCount elements less than or equal to a given value in a sorted rotated array in C++
A sorted and rotated array is an array that is sorted in ascending or descending order and then rotated either left or right by a specific number of elements. There should exist exactly one pivot point around which the array is rotated. Example Here is an example of counting elements less than or equal to a given value in the sorted and rotated array: Case 1 The given array is: 30 40 50 10 20 Given value = 25 Output Count: 2 (10, 20) Case 2 The given array is: 10 20 30 40 ...
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