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 by Chandu yadav
Page 32 of 81
Schedule a task for execution in Java after a given delay
One of the methods in the Timer class is the void schedule(Timertask task, long delay) method. This method schedules the specified task for execution after the specified delay.Declaration −The java.util.Timer.schedule(Timertask task, long delay) is declared as follows −public void schedule(Timertask task, long delay)There are few exceptions thrown by the schedule(Timertask task, long delay) method. They are as follows −IllegalArgumentExceptionThis exception is thrown if delay is negative, or delay + System.currentTimeMillis() is negative.IllegalStateExceptionThis exception is thrown if task was scheduled or cancelled beforehand, timer was cancelled, or timer thread terminated.NullPointerExceptionThis exception is thrown if the task is null.Let us see a ...
Read MoreSecure Hashes and Message Digest in Python
For the secure hash and message digest process, we should use the hashlib module. This module implements a common interface for different secure hash algorithm like SHA1, SHA224, SHA256, SHA512 etc. Also the RSA’s MD5 algorithm. Older algorithms are known as the Message Digest and the new methods are called Secure Hash. To use this module, we need to import the hashlib module in the python code. import hashlib In this method, there are some predefined algorithms like md5, sha1, sha224, sha256, sha512 are present. We can add additional algorithms from the OpenSSL library. Some methods, constants of ...
Read MoreHow to throw a C++ exception?
Exception handling is used to handle the exceptions. We can use try catch block to protect the code. Exception can be thrown anywhere within the code block. The keyword “throw” is used to throw an exception.Here is an example of throw in C++ language,Example#include using namespace std; int display(int x, int y) { if( y == 0 ) { throw "Division by zero condition!"; } return (x/y); } int main () { int a = 50; int b = 0; int c = 0; try { c = display(a, b); cout
Read MoreCall the run() method of the Timer Task in Java
The java.util.TimerTask.run() method looks onto the action to be performed by the task. It is used to carry out the action performed by the task.Declaration −The java.util.TimerTask.run() method is declared as follows −public abstract void run()Let us see an example program to call the run() method of the Timer Task −Exampleimport java.util.*; class MyTask extends TimerTask { public void run() { System.out.println("Running"); } } public class Example { public static void main(String[] args) { // creating timer task, timer TimerTask task = new MyTask(); Timer ...
Read Moreexpm1() in C++
The function expm1() is used to calculate the exponential raised to the power of any number minus one. It returns the value of (exponential raised to the power of a) - 1.Here is the mathematical expression of expm1(),expm1(a) = (e^a) - 1Here is the syntax of expm1() in C++ language,float expm1(variable_name);Here,variable_name − Any name given to the variable whose value is calculated.Here is an example of expm1() in C++ language,Example#include #include using namespace std; int main() { int x = 10; float y = 8.28; cout
Read MorePassing and Returning Objects in Java
As we know it is core concept that in Java there is always pass by value and not by pass by reference.So in this post we will focus on that how this concept get validated in case of passing primitive and passing reference to a method.In case when a primitive type is passed to a method as argument then the value assigned to this primitive is get passed to the method and that value becomes local to that method, which means that any change to that value by the method would not change the value of primitive that you have ...
Read MoreHow to format message with integer fillers in Java
To format message with integer fillers in Java, we use the MessageFormat class. The MessageFormat class gives us a way to produce concatenated messages which are not dependent on the language. The MessageFormat class extends the Serializable and Cloneable interfaces.Declaration − The java.text.MessageFormat class is declared as follows −public class MessageFormat extends FormatThe MessageFormat.format(pattern, params) method formats the message and fills in the missing parts using the objects in the params array matching up the argument numbers and the array indices.The format method has two arguments, a pattern and an array of arguments. The pattern contains placeholder in {} curly ...
Read MoreCount the Number of matching characters in a pair of Java string
In order to find the count of matching characters in two Java strings the approach is to first create character arrays of both the strings which make comparison simple.After this put each unique character into a Hash map.Compare each character of other string with created hash map whether it is present or not in case if present than put that character into other hash map this is to prevent duplicates.In last get the size of this new created target hash map which is equal to the count of number of matching characters in two given strings.Exampleimport java.util.HashMap; public class MatchingCharacters ...
Read MoreFind frequency of each word in a string in Java
In order to get frequency of each in a string in Java we will take help of hash map collection of Java.First convert string to a character array so that it become easy to access each character of string.Now compare for each character that whether it is present in hash map or not in case it is not present than simply add it to hash map as key and assign one as its value.And if character is present than find its value which is count of occurrence of this character in the string (initial we put as 1 when it ...
Read MoreHow to convert JS date time to MySQL datetime?
We can convert JS date time to MySQL datetime with the help of toISOString() function.Let us see an example of JavaScript.Example Web Page Design document.writeln(new Date().toISOString().slice(0, 19).replace('T', ' ')); Current Date is displayed above... OutputThe following is the output.2018-11-23 11:14:38 Current Date is displayed above...
Read More