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Java Articles
Page 133 of 450
How To Find Volume of the Octahedron in Java?
An octahedron is a three-dimensional (3D) shape which has eight plane faces. In other words, a polyhedron is called an octahedron which has eight faces, twelve edges, and 6 vertices. A polygonal is a three-dimensional figure with flat polygonal faces, straight edges, and sharp corners or vertices. The word octahedron is derived from the Greek word that is Oktaedron, which means Eight faces. Here is the diagram of the octahedron, which has side a: Volume of octahedron The volume of an octahedron is the amount of space occupied by the octahedron. To calculate the volume of an octahedron, we ...
Read MoreHow To Check Whether a Number is a Keith Number or Not in Java?
What is Keith Number? A number is said to be a Keith number if it is arranged with a special sequence of numbers, which are initially created by its digits. The number sequence will be generated by adding its previous numbers till the number exceeds the input number. The results will be decided if the end number is exactly the same as the input number. For example, let's consider the number 14. The sequence will be as follows: s1 = 1, 4 s2 = 1, 4, 1 + 4 s3 = 1, 4, 5, 4 + 5 s4 = ...
Read MoreHow To Find Volume of Dodecahedron in Java?
A dodecahedron is a three-dimensional shape that has twelve flat faces. It is derived from two Greek words, i.e., 'dodeka', which means 12, and 'hedra', which means face. In other words, a dodecahedron is a special type of polyhedron that has 12 faces. To make a dodecahedron, you can use the 12 pyramids and the base as a pentagon. Following diagram will provide a better understanding of its shape and edges: Where a is the length of the edge. Volume of Dodecahedron A dodecahedron volume refers to the amount of space occupied by this 3D shape, which has 12 faces. ...
Read MoreHow To Check Whether a Number is a Goldbach Number or Not in Java?
What is Goldbach Number? A number is said to be a Goldbach number if the number can be expressed as the addition of two odd prime number pairs. For example, let's consider the number 98 and find the pairs of prime numbers (19, 79). If you calculate the sum of 19 + 79, you get 98, so 98 is a Goldbach number. If we follow the above condition, then we can find that every even number larger than 4 is a Goldbach number because it must have any pair of odd prime number pairs. But the odd numbers are not satisfying because we know ...
Read MoreWhen can a double-type be preferred over float-type in Java?
In Java, both double and float are data types that are used to declare a variable that can store only decimal values or floating point numbers. For example: 1.2343, 3.343, 24.321234, etc. The double data type is larger in size compared to the float data type. When to Prefer Double Type Over Float Type A double-type is preferred over a float-type if a more precise and accurate result is required. The precision of double-type is up to 15 to 16 decimal points, while the precision of float type is only around 6 to 7 decimal digits. Following are the syntaxes for ...
Read MoreHow to Check Whether a Number is a Triangular Number or Not in Java?
A Triangular number of a natural number n, which is defined as the sum of all natural numbers starting from 1 to n. It is called triangular as we can represent it in the form of an equilateral triangular grid by using the total number of points where the row number equals the point number, which means in the 1st row 1 point, in the 2nd row 2 points, in the 3rd row 3 points, and so on. Examples of triangular numbers are 1, 3, 6, 10, 21, 55, etc. In simple terms, we can say a number is a ...
Read MoreHow To Check Whether a Number is an Empire Number or Not in Java?
What is Empire Number? A number is said to be an Empire number if it is a prime number, and when we reverse that number, we should get another prime number. For example, let's consider the number 17. We know that 17 is a prime number, and if we reverse this number, we get 71, which is also a prime number. Therefore, 17 is known as an empire number. Here are some other examples of prime numbers such as 11, 13, 17, etc. Input & Output Scenarios Below are a few input and output scenarios that help to understand the ...
Read MoreHow To Check if a Given Point Lies Inside a Rectangle in Java?
A Rectangle is a closed two-dimensional shape that has 4 sides and 4 corners. The opposite sides are of the same length and parallel to each other. All 4 interior angles are equal, angles measure 90 degrees. It is a four-sided polygon. Following is the diagram of the Rectangle: Checking Points Inside Rectangle A point is said to lie inside a rectangle if its x and y coordinates are between the x and y coordinates of the opposite corners of the rectangle. To determine whether the point lies within the rectangle, we will use the following approaches: ...
Read MoreHow to get the parent process of the Process API in Java 9?
In this article, we will learn to get the parent process of the Process API in Java 9. First, we will know about Process API and its methods, after that we will learn about the ProcessHandle interface. Process API In Java, the Process API, we can perform any operation regarding a process. The Process class provides methods for performing input on the processes, performing output to the processes, finding child and parent processes of the currently running process, and destroying the process. The following are some of the common methods of the Process API: destroy(): ...
Read MoreWhen to use the readAllBytes() method of InputStream in Java 9?
In this article, we will learn to use the readAllBytes() method of InputStream in Java 9. We will get to know the readAllBytes() method with its syntax, then we will learn about the InputStream Class with its methods, and lastly, we will learn the use of readAllBytes() with an example What is the readAllBytes() Method? In Java 9, the readAllBytes() method reads all bytes from an InputStream object at once and blocks until all remaining bytes have been read and the end of the stream is detected, or an exception is thrown. It returns a byte array containing the ...
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