Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles on Trending Technologies
Technical articles with clear explanations and examples
C++ Program to Multiply Two Matrix Using Multi-dimensional Arrays
A matrix is a rectangular array of numbers that is arranged in the form of rows and columns.An example of a matrix is as follows.A 3*3 matrix has 3 rows and 3 columns as shown below −8 6 3 7 1 9 5 1 9A program that multiplies two matrices using multidimensional arrays is as follows.Example#include using namespace std; int main() { int product[10][10], r1=2, c1=3, r2=3, c2=3, i, j, k; int a[2][3] = { {2, 4, 1} , {2, 3, 9} }; int b[3][3] = { {1, 2, 3} , {3, 6, 1} , {2, 9, 7} }; if (c1 != r2) { cout
Read MoreParse string date value input in Java
UseSimpleDateFormat('dd-MMM-yy') for string date.Format dateFormatter = new SimpleDateFormat("dd-MMM-yy");For above class, do not forget to import the following package, else an error would be visible.import java.text.SimpleDateFormat;Now, parse the date.Date dt = (Date) dateFormatter.parseObject("20-Nov-18");Exampleimport java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; public class Main { public static void main(String[] argv) throws Exception { Format dateFormatter = new SimpleDateFormat("dd-MMM-yy"); // parse Date dt = (Date) dateFormatter.parseObject("20-Nov-18"); System.out.println("Date = "+dt); } }OutputDate = Tue Nov 20 00:00:00 UTC 2018
Read MoreDisplay path separator in Java
To display the path separator, use the Properties class and import the following package −import java.util.Properties;Use the getProperties() method first and create an object −Properties p = System.getProperties();Now, set the key for path separator −p.getProperty("path.separator")The following is an example −Exampleimport java.util.Properties; public class Demo { public static void main(String[] args) { Properties p = System.getProperties(); System.out.println("Separator is "+p.getProperty("path.separator")); } }OutputSeparator is :
Read MoreSet width and precision to format output in Java
Set width in output as shown below. Here, %10 sets a 10 character fieldSystem.out.printf("d1 = %10.2f d2 = %8g", d1, d2);Above, the value after the decimal is for decimal places i.e. 5.3 is for 3 decimal places −System.out.printf("d1 = %5.3f d2 = %2.5f", d1, d2);The following is an example −Examplepublic class Demo { public static void main(String[] args) throws Exception { double d1 = 399.8877; double d2 = 298.87690; System.out.printf("d1 = %10.2f d2 = %8g", d1, d2); System.out.printf("d1 = %5.3f d2 = %2.5f", d1, d2); } }Outputd1 = 399.89 d2 = 298.877 d1 = 399.888 d2 = 298.87690
Read MoreConcatenate null to a string in Java
To concatenate null to a string, use the + operator.Let’s say the following is our string.String str = "Demo Text";We will now see how to effortlessly concatenate null to string.String strNULL = str + "null";The following is the final example.Examplepublic class Demo { public static void main(String[] args) { String str = "Demo Text"; System.out.println("String = "+str); String strNULL = str + "null"; System.out.println("String concatenated with NULL: "+strNULL); } }OutputString = Demo Text String concatenated with NULL: Demo Textnull
Read MoreGet localized day name in Java
The following is an example.Exampleimport java.util.Date; import java.text.DateFormat; import java.text.SimpleDateFormat; public class Demo { public static void main(String[] args) throws Exception { Date d = new Date(); DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss a"); String format = dateFormat.format(d); System.out.println("Current date and time = " + format); System.out.printf("Localized day name = %tA/%TA", d, d); } }OutputCurrent date and time = 26/11/2018 11:44:44 AM Localized day name = Monday/MONDAY
Read MoreC++ Program to Find the Number of Vowels, Consonants, Digits and White Spaces in a String
A string is a one dimensional character array that is terminated by a null character. There can be many vowels, consonants, digits and white spaces in a string.For example.String: There are 7 colours in the rainbow Vowels: 12 Consonants: 15 Digits: 1 White spaces: 6A program to find the number of vowels, consonants, digits and white spaces in a string is given as follows.Example#include using namespace std; int main() { char str[] = {"Abracadabra 123"}; int vowels, consonants, digits, spaces; vowels = consonants = digits = spaces = 0; for(int i = 0; str[i]!='\0'; ++i) ...
Read MoreParse and format a number to decimal in Java
To parse and format a number to decimal, try the following code.Examplepublic class Demo { public static void main( String args[] ) { int val = Integer.parseInt("5"); String str = Integer.toString(val); System.out.println(str); } }Output5In the above program, we have used the Integer.parseInt() and Integer.toString() method to convert a number to decimal.int val = Integer.parseInt("5"); String str = Integer.toString(val);The toString() method above represents a value in string and formats.
Read MoreGet Java Home Directory
Use the System.getProperty() method in Java to get the Java Home Directory.It’s syntax is −String getProperty(String key)Above, the key is the name of the system property. Since, we want the Java Home Directory name, therefore we will add the key as −java.homeThe following is an example −Examplepublic class Demo { public static void main(String[] args) { System.out.println("Get Java Home Directory = " + System.getProperty("java.home")); System.out.print("Java Specification Version: "); System.out.println(System.getProperty("java.specification.version")); System.out.print("java Runtime Environment (JRE) ...
Read MoreGet localized short day-in-week name in Java
Use the ‘a’ date conversion character to display short day-in-week.System.out.printf("Localized short day name = %ta/%Ta", d, d);Above, d is a date object −Date d = new Date();The following is an example −Exampleimport java.util.Date; import java.text.DateFormat; import java.text.SimpleDateFormat; public class Demo { public static void main(String[] args) throws Exception { Date d = new Date(); DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss a"); String format = dateFormat.format(d); System.out.println("Current date and time = " + format); ...
Read More