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Page 404 of 589
Java Program for Search an element in a sorted and rotated array
Suppose you have a sorted array with no duplicate values and from a certain index this array is rotated. You have to search for a particular element in it. If it is available in the array then return the index otherwise return -1. In this article, we will solve the given problem using two approaches Linear search and Binary search. Approach 1: Using Linear Search This approach will search for the given element in sequential manner. Algorithm Step 1 − First, declare and initialize an array named ‘araylist’ and an integer variable named ‘searchElem’ that we are going ...
Read MoreStringJoiner Class vs String.join() Method to Join String in Java
There are numerous ways of joining strings in java. The StringJoiner class and String.join() method are two of them. Both are used to join two or any number of strings but the difference lies in their implementation. In this article, we will try to find the differences that exist in the usage of StringJoiner class and String.join() method. StringJoiner Class It is a class available in java.util package and it is added from JDK 8. We can join multiple strings at a time. Before using, it is necessary to import it into our program using the following command ...
Read MoreString Arrays in Java
String and Arrays are two distinct things. Array is a linear data structure that is used to store group of elements with similar datatypes but a string is a class in Java that stores a series of characters. Those characters are actually String-type objects. Since strings are objects we can say that string arrays are group of string-type objects. In this article, we will understand string arrays in java and perform some operations on them. String Arrays The string array is a combination of array and string both. Therefore, it has the properties of both array and string such ...
Read MoreHow to Know whether a Line Touches, Intersects or Lie Outside a Circle in Java?
A circle is a closed shape formed by tracing a point that moves in a plane such that its distance from a given point is constant. A line is a straight one-dimensional figure that does not have a thickness, and it extends endlessly in both directions. In this article we will check if a given line touches a circle or intersects it using java. We will be given with the centre coordinates and radius of a circle along with equation of the line. We need to check if the given line collides with the circle or not and hence three ...
Read MoreHow to Know If Two Convex Regular Polygons have Same Centre or Not in Java?
A polygon is a 2-dimensional closed shape that has at least 3 sides. Depending on the number of sides, relationships of the sides and angles, and other characteristics, polygons can be classified under different names like triangles, squares, and quadrilaterals. The convex polygon definition explains that one is a polygon whose angles are all less than 180 degrees each. That also means that the vertices, the point where two sides meet, all point outward from the centre of the shape. In this article, we will find if two convex regular polygons have same centre or not. We will take two ...
Read MoreHow to Confirm If Given Four Points Form a Square in Java?
A square is a two-dimensional shape which has four sides of equal length. The opposite sides of a square are parallel to each other and all four interior angles are right angles with diagonal of equal length. In this article we will check how to confirm if given four points form a square. We will be given a square with four points i.e. A, B, C, D as shown in the figure − We need to check from these points that if they form a square or not. To check this it should satisfy the following condition − ...
Read MoreReplace Negative and Positive Matrix Elements with 0 & 1 in Java
In Java, Array is an object. It is a non-primitive data type which stores values of similar data type. The matrix in java is nothing but a multi-dimensional array which represents multiple rows and columns. Here we have given a matrix which contains set of elements including both positive and negative numbers and as per the problem statement we have to replace negative numbers with 0 and positive numbers with 1. Let’s deep dive into this article, to know how it can be done by using Java programming language. To show you some instances Instance-1 Given matrix =-21 22 -23 24 -25 26 ...
Read MoreHow to Print Lower Triangular Matrix in Java?
In Java, Array is an object. It is a non-primitive data type which stores values of similar data type. The matrix in java is nothing but a multi-dimensional array which represents multiple rows and columns. Triangular Matrix − A square matrix is called as a triangular matrix if all the elements above or below the diagonal of that matrix are zeros. Lower- Triangular Matrix − A square matrix is called as a Lower- Triangular Matrix if all the elements above the diagonal of that matrix are zeros. Here we have to print the lower triangular matrix. Let’s start! To show ...
Read MoreHow to Find Sum of Matrix Elements in Java?
In Java, Array is an object. It is a non-primitive data type which stores values of similar data type. The matrix in java is nothing but a multi-dimensional array which represents multiple rows and columns. Here we have given a matrix which contains set of elements and as per the problem statement we have to find out the sum of all the elements present inside the matrix. Let’s deep dive into this article, to know how it can be done by using Java programming language. To show you some instances Instance-1 Given matrix =21 22 23 24 25 26 27 28 29 Sum ...
Read MoreHow to Display an Identity Matrix in Java?
In Java, Array is an object. It is a non-primitive data type which stores values of similar data type. The matrix in java is nothing but a multi-dimensional array which represents multiple rows and columns. An identity matrix is a square matrix where all the elements of the main diagonal (i.e., the diagonal from the top-left to the bottom-right corner) are 1, and all the other elements are 0. It is denoted by the symbol "I" or "In", where "n" represents the size of the matrix. The identity matrix is important in linear algebra because it acts as the ...
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