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Articles on Trending Technologies
Technical articles with clear explanations and examples
Java Signature getProvider() method with Examples
The provider for the signature object can be obtained using the method getProvider() in the class java.security.Signature.Let us now see an example −Exampleimport java.security.*; import java.util.*; public class Main { public static void main(String[] argv) { try { Signature signature = Signature.getInstance("SHA256withRSA"); Provider provider = signature.getProvider(); System.out.println("The Provider is: " + provider); } catch (NoSuchAlgorithmException e) { System.out.println("Error!!! NoSuchAlgorithmException"); } } }OutputThe Provider is: SunRsaSign version 11ExampleLet us now see another example −import ...
Read MoreThe abstract keyword in Java
A class which contains the abstract keyword in its declaration is known as abstract class. Abstract classes may or may not contain abstract methods, i.e., methods without body. But, if a class has at least one abstract method, then the class must be declared abstract.If a class is declared abstract, it cannot be instantiated. To use an abstract class, you have to inherit it from another class, provide implementations to the abstract methods in it. If you inherit an abstract class, you have to provide implementations to all the abstract methods in it.Let us see a simple example −Exampleabstract class CricketLeague { abstract void ...
Read MoreJava Signature getInstance() method with Examples
A signature object that can implement the required signature algorithm can be obtained using the method getInstance() in the class java.security.Signature.Let us now see an example −Exampleimport java.security.*; import java.util.*; public class Main { public static void main(String[] argv) { try { Signature signature = Signature.getInstance("SHA256withRSA"); String str = signature.toString(); System.out.println(str); } catch (NoSuchAlgorithmException e) { System.out.println("Error!!! NoSuchAlgorithmException"); } } }OutputSignature object: SHA256withRSALet us now see another example −Exampleimport java.security.*; import java.util.*; public ...
Read MoreJava Signature getAlgorithm() method with Examples
The name of the algorithm for the signature object can be obtained using the method getAlgorithm() in the class java.security.Signature.Let us now see an example −Exampleimport java.security.*; import java.util.*; public class Main { public static void main(String[] argv) { try { Signature signature = Signature.getInstance("SHA256withRSA"); String algorithm = signature.getAlgorithm(); System.out.println("The Algorithm = " + algorithm); } catch (NoSuchAlgorithmException e) { System.out.println("Error!! NoSuchAlgorithmException"); } } }OutputThe Algorithm = SHA256withRSALet us now see another example ...
Read MoreLog functions in Java
The log functions in Java are part of java.lang.Math. The functions include log, log10, log1p. Let us see an example of each of these log functions −static double log(double a)The java.lang.Math.log(double a) returns the natural logarithm (base e) of a double value. Let us see an example −Exampleimport java.io.*; public class Main { public static void main(String args[]) { // get two double numbers double x = 60984.1; double y = -497.99; // get the natural logarithm for x System.out.println("Math.log(" + x + ")=" ...
Read MoreProgram for Area Of Square in C++
We are given with a side of a rectangle and our task is to print the area of the square from that side.Square is 2-D plain figure which have 4 sides and forms 4 angles of 90degree each and all the sides are of equal shape. In other words we can say that the square is a form of rectangle with equal sides.Given below is representation of a square −The Area of square is Side x SideExampleInput: 6 Output: 36 As the side is 6 so the output is 6*6=36 Input: 12 Output: 144AlgorithmSTART Step 1-> Declare a function ...
Read MoreProgram to check if N is a Pentagonal Number in C++
Given with a number N the task is to check whether the number is a pentagonal number or not. Numbers that can be arranged to form a pentagon is a pentagonal number as these numbers can be used as points to form a pentagon. For example, some of pentagonal numbers are 1, 5, 12, 22, 35, 51....We can use formula to check whether the number is a pentagonal number or not$$p(n)=\frac{\text{3}*n^2-n}{\text{2}}$$Where, n is the number of points pentagonal will haveExampleInput-: n=22 Output-: 22 is pentagonal number Input-: n=23 Output-: 23 is not a pentagonal numberAlgorithmStart Step 1 -> declare function ...
Read MoreC++ Program to Convert Km/hr to miles/hr and vice versa
If input is in km/hr convert it to miles/hr else input will be in miles/hr convert it to km/hr. There are formulas that can be used for this conversion.Conversion Formulas −1 kilo-metre = 0.621371 miles 1 miles = 1.60934 Kilo-meterExampleInput-: kmph= 50.00 Mph = 10.00 Output-: speed in m/ph is 31.07 speed in km/ph is 16.0934AlgorithmStart Step 1 -> Declare function to convert km/ph to m/ph double km_mph(double km) return 0.6214 * km step 2 -> Declare function to convert m/ph to km/ph double m_km(double m_ph) return m_ph * 1.60934 ...
Read MoreProgram to convert speed in km/hr to m/sec and vice versa in C++
Conversion Formulas −1 km/hr = 5/18 m/sec or 0.277778 m/sec 1 m/sec = 18/5 km/hr or 3.6 km/hrExampleInput-: km = 60.00 mk = 70.00 Output-: speed in meter per second = 16.6667 speed in km per hour = 252AlgorithmStart Step 1 -> Declare function to convert km/hr into m/sec float km_m(float km) return (0.277778 * km) Step 2 -> Declare function to convert m/sec into km/hr float m_km(float mk) return (3.6 * mk) step 3 -> In main() declare variable as float km = 60.0 and float mk = ...
Read MoreProgram to check if two given matrices are identical in C++
Given two matrix M1[r][c] and M2[r][c] with 'r' number of rows and 'c' number of columns, we have to check that the both given matrices are identical or not. If they are identical then print "Matrices are identical" else print "Matrices are not identical"Identical MatrixTwo matrices M1 and M2 are be called identical when −Number of rows and columns of both matrices are same.The values of M1[i][j] are equal to M2[i][j].Like in the given figure below both matrices m1 and m2 of 3x3 are identical −$$M1[3][3]=\begin{bmatrix} 1 & 2 & 3 \ 4 & 5 & 6 \ 7 & ...
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