Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Date and time formatting can be done very easily using the printf method. You use a two-letter format, starting with t and ending in one of the letters of the table as shown in the following code.ExampleLive Demoimport java.util.Date; public class DateDemo { public static void main(String args[]) { // Instantiate a Date object Date date = new Date(); // display time and date String str = String.format("Current Date/Time : %tc", date ); System.out.printf(str); } }This will produce the following ... Read More
An Object relational model is a combination of a Object oriented database model and a Relational database model. So, it supports objects, classes, inheritance etc. just like Object Oriented models and has support for data types, tabular structures etc. like Relational data model.One of the major goals of Object relational data model is to close the gap between relational databases and the object oriented practises frequently used in many programming languages such as C++, C#, Java etc.History of Object Relational Data ModelBoth Relational data models and Object oriented data models are very useful. But it was felt that they both ... Read More
If the remainder of the number when it is divided by 2 is 0, then it would be divisible by 2.Let’s say our number is 5, we will check it using the following if-else −// checking if the number is divisible by 2 or not if (num % 2 == 0) { Console.WriteLine("Divisible by 2 "); } else { Console.WriteLine("Not divisible by 2"); }ExampleThe following is an example to find whether the number is divisible by 2 or not.Live Demousing System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Demo { class MyApplication { static ... Read More
Let’s say we have set the number for which we will find the sum of digits −int val = 789; Console.WriteLine("Number:", val);The following will find the sum of digits by entering the number and checking it recursively −public int addFunc(int val) { if (val != 0) { return (val % 10 + addFunc(val / 10)); } else { return 0; } }ExampleThe following is our code to find the sum of digits of a number using Recursion in C#.Live Demousing System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Demo { ... Read More
Common Language Runtime (CLR) manages the execution of .NET programs. The just-in-time compiler converts the compiled code into machine instructions. This is what the computer executes.The services provided by CLR include memory management, exception handling, type safety, etc.Let us see the features of Common Language Runtime (CLR) in C#:ComponentsComponents in other languages can be easily worked upon with CLR.ThreadingThe CLR provides support for threads to create multithreaded applications.Class Library SupportIt has built-in types and libraries for assemblies, threading, memory management, etc.DebuggingCLR makes code debugging easier.Garbage CollectionIt provides automatic garbage collection in C#.
To compare strings in C#, use the compare() method. It compares two strings and returns the following integer values −If str1 is less than str2, it returns -1. If str1 is equal to str2, it returns 0. If str1 is greater than str2, it returns 1.Set the two strings in the String.compare() method and compare them −string.Compare(string1, string2);ExampleYou can try to run the following code to compare two strings in C#.Live Demousing System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Demo { class MyApplication { static void Main(string[] args) { ... Read More
With JDK 7, we can create a translucent window using swing very easily. With following code, a JFrame can be made translucent.// Set the window to 55% opaque (45% translucent). frame.setOpacity(0.55f);ExampleSee the example below of a window with 55% translucency.import java.awt.GridBagLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.SwingUtilities; public class Tester { public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true); // Create the GUI on the event-dispatching thread SwingUtilities.invokeLater(new Runnable() { @Override public void ... Read More
A toast message is an alert which disappears with time automatically. With JDK 7, we can create a toast message similar to an alert on android very easily. Following are the steps needed to make a toast message.Make a rounded rectangle shaped frame. Add a component listener to frame and override the componentResized() to change the shape of the frame. This method recalculates the shape of the frame correctly whenever the window size is changed.frame.addComponentListener(new ComponentAdapter() { @Override public void componentResized(ComponentEvent e) { frame.setShape(new RoundRectangle2D.Double(0, 0, frame.getWidth(), frame.getHeight(), 20, 20)); } ... Read More
You can sleep for any period of time from one millisecond up to the lifetime of your computer. For example, the following program would sleep for 3 seconds −Example Live Demoimport java.util.*; public class SleepDemo { public static void main(String args[]) { try { System.out.println(new Date( ) + ""); Thread.sleep(5*60*10); System.out.println(new Date( ) + ""); } catch (Exception e) { System.out.println("Got an exception!"); } } }This will produce the following result −OutputSun May 03 18:04:41 GMT 2009 Sun May 03 18:04:51 GMT 2009
Swing API is a set of extensible GUI Components to ease the developer's life to create JAVA based Front End/GUI Applications. It is built on top of AWT API and acts as a replacement of AWT API since it has almost every control corresponding to AWT controls.Following example showcases a simple calculator application.import java.awt.BorderLayout; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; public class Calculator implements ActionListener { private static JTextField inputBox; Calculator(){} public static void main(String[] args) { createWindow(); } ... Read More