public class Palindrome { public static void main(String [] args){ try{ BufferedReader object = new BufferedReader( new InputStreamReader(System.in)); System.out.println("Enter number"); int num= Integer.parseInt(object.readLine()); int n = num; int rev=0; System.out.println("Number: "); System.out.println(" "+ num); for (int i=0; i<=num; i++){ int r=num%10; num=num/10; rev=rev*10+r; i=0; } System.out.println("After reversing the number: "+ " "); System.out.println(" "+ rev); if(n == rev){ System.out.print("Number is palindrome!"); } else{ System.out.println("Number is not palindrome!"); } } catch(Exception e){ System.out.println("Out of range!"); } } }
Difference Between Two Days import java.io.*; import java.util.*; import java.util.Date.*; import java.util.Calendar; import java.lang.Math.*; import java.util.StringTokenizer; public class DateDemo { String s,s1; int i; int d,d1,m,m1,y,y1; public void add(String a,String b) { s=a; s1=b; StringTokenizer ss=new StringTokenizer(s,"/"); while(ss.hasMoreTokens()) { d=Integer.parseInt(ss.nextToken()); m=Integer.parseInt(ss.nextToken()); y=Integer.parseInt(ss.nextToken()); } StringTokenizer st=new StringTokenizer(s1,"/"); while(st.hasMoreTokens()) { d1=Integer.parseInt(st.nextToken()); m1=Integer.parseInt(st.nextToken()); y1=Integer.parseInt(st.nextToken()); } Calendar c1=Calendar.getInstance(); Calendar c2=Calendar.getInstance(); c1.set(y,m,d); c2.set(y1,m1,d1);
long t1=c1.getTimeInMillis(); long t2=c2.getTimeInMillis(); long t3=Math.abs(t1-t2); i=60*1000*60*24; System.out.println(t3); long diff= t3/i; System.out.println("Difference btn"+ s+" and"+s1+" is"+diff+"days"); } public static void main(String args[])throws Exception { BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); DateDemo dd=new DateDemo(); System.out.println("Enter the date as dd/mm/yyyy"); String d1=br.readLine(); System.out.println("Enter second date as dd/mm/yy"); String d2=br.readLine(); dd.add(d1,d2); } }
JavaScript can be used to validate forms, provide interactive calendars, post the current day's headlines, produce background effects on a Web page, and play games, among many other things.
Netscape created JavaScript in 1995. It was originally called "LiveScript”.
An Introduction
JavaScript is not Java
JavaScript can either be client-side or server-side
JavaScript is an object-based scripting language
JavaScript is cross-platform
JavaScript comes in different 'flavors'
JavaScript: This was the name given by Netscape, who invented it.
JScript: This is the scripting language invented by Microsoft to compete with JavaScript.
ECMAScript: The de facto international standard for JavaScript. This standard covers the core of the language.
Comments
// This whole line will be ignored by the JS interpreter
var myOldCar = Ford// The first part will be interpreted; this part will be ignored.
If you need to comment out several lines, you would begin with a forward slash and an asterisk, "/*", and end with an asterisk and a forward slash, "*/". For example,
/* All of this, all three lines,
will be ignored in their entirety
by the JavaScript interpreter */
Remember that JavaScript is case-sensitive.
Remember that the semicolon at the end of a statement is optional in JavaScript. But it is a good programming practice to include one.
Where Does the Script Go?
There are three places where a script can be located:
In the top section of the page ("head"), between the and tags;
In the middle section of the page ("body"), between the and tags; or
In a separate file.
Placing the Script on the Page
When the script is placed on the page, it is located between a set of container tags that look like:
Data Types
JavaScript is a "loosely typed" language, meaning you don't need to specify the type of data being declared in a variable.
There are four basic data types used in JavaScript: strings, numbers, booleans, and nulls.
1. Strings
The following are examples of a string:
"cheeseburger"
"123 Main Street, Anytown, FL32714"
var favfood="a big juicy hamburger";// Correct
var favfood='a big juicy hamburger';// Correct
var favfood="a big juicy hamburger';// Incorrect
HTML elements can also be used inside of strings. Doing so will help you to create more dynamic pages.
document.write("This is really fantastic!");
2. Numbers
·JavaScripts recognizes two types of numbers: integers and floating point numbers.
·Integers are whole numbers (e.g., 1, 20, 546).
·Floating point numbers are numbers that have a decimal point (e.g., 23.8, 23.890).
·Default is floating point number.
3. Boolean
A Boolean data type is used for true or false statements. It's mostly used in if() statements:
var myCar=Chevy;
if (myCar==Chevy)
...
4. Null
A null variable has no value. A null variable is useful for testing input in scripts. Since it's a keyword, it doesn't need to be enclosed in quotation marks:
var nothingNow=null;
Variables
A variable is declared using the var reserved word. A variable can be declared and initialized using one of two methods.
var myName;
myName="Lee";
var myName="Lee";
Our First Script
Let's take a break and write our first script. First, open a new document in your text editor and insert the following HTML elements:
Top of Form
Just a Demo
This will give an alertbox.
The JavaScript Diaries: Part 2
This time, we use a prompt box.
Just a Demo
A prompt is the result of this program.
Special Operators
Operator
Name
Description
?:
Conditional
A type of if...else statement. A condition is placed before the (?) and a value is placed on each side of the (:)
,
Comma
Used to process a series of expressions
delete
Delete
Deletes an object, property, or element from an array
in
In
Used to inspect the contents of a specified object
instanceof
Instanceof
Tests an object to see if it is of a specified object.
new
New
Creates an instance of an object
this
This
Refers to the current object
typeof
Typeof
Identifies the type of value being evaluated
void
Void
Evaluates an expression without returning a value
Writing Functions
function giveName()
{
code goes here;
code goes here;
}
Calling a Function
giveName();.
Example:
Place this in the portion:
Then, put this in the portion:
Window Object Event Handlers
An event handler is a JavaScript
keyword that allows a script to perform certain functions based on events on a Web page. Anytime something happens — a page loads, a link is clicked, the mouse moves — an event happens. Many times it's desirable to control these events. This can be done by using event handlers.
onLoad
Thisevent handler is used to execute a script after a page has fully loaded. That
includes loading all scripts, graphics, plugins and Java applets.
onUnload
This event handler is used toexecute a script before the page in the browser is exited. It's executed in the same manner as the onLoadevent handler. An example would be:
onFocus
This eventhandler executes whenever a window or form element is selected by the visitor
by clicking on the item, using the keyboard, or through manipulation by a script. An example is shown below:
function errpage() {
document.write(“Error”);
}
The history Object
Browsers store a list of URLs that the user has previously visited. This list enables the user to navigate to previously visited Web pages using the back and forward buttons in the browser. This list of URL's is called the browser's history. It's stored in the form of a list (a portion is pictured at right) that can be accessed by JavaScript. For security reasons, a JavaScript function can't read the URL's that are stored in the history object, so you can't use the list to figure out where your visitors have been.
Methods
back() forward()
The back() and forward() methods do exactly what they say. They reload the previous page or go to the next page in the browser's history. They act exactly like the browser's Back and Forward buttons. The methods can be written as follows:
onClick="history.back()"> // combine with line above
onClick="history.forward()"> // combine with line above
go()
The go() method is used to move forward or back more than one page at a time in the history list. This is done by placing the number of pages you want to go in the parentheses. Positive numbers move the browser forward; negative numbers move the browser backward. It's like moving in steps. If you want to go forward one page (one step), use this:
history.go(1)
To go back two pages (two steps), you would use this:
history.go(-2)
The problem with this method is that you need to make sure that the browser's history contains that many URLs.
The Date Object
JavaScript uses the Date() constructor to obtain and manipulate the day and time in a script. The information is taken from the user's computer and is only as accurate as the user's system.
Creating Dates
var d=new Date();
document.write("The date is "+ d.toLocaleDateString()+" ");
document.write("and the time is "+ d.toLocaleTimeString());
which would print as follows:
The date is Friday, September 22, 2006 and the time is 2:29:28 PM
San Francisco: Microsoft is to strip its Internet Explorer browser from the new version of its Windows 7 operating system that it sells in Europe, the company announced Thursday.
Microsoft said the move was designed to meet criticism from European Union (EU) regulators who have launched an investigation into whether bundling the browser with the operating system is in breach of European anti-trust rules.
"Given the pending Microsoft to strip Internet Explorer browser from European Windows, we will offer it separately and on an easy-to-install basis to both computer manufacturers and users," Microsoft said in a statement.
"This means that computer manufacturers and users will be free to install Internet Explorer on Windows 7, or not, as they prefer."
Windows 7 is scheduled to be generally available Oct 22. Ironically, Microsoft is making the changes as rival firms like Firefox, Apple Safari and Google Chrome chip away at Internet Explorer's once unassailable lead.
Today Kerala Medical and Engineering results are to be published.For results through phones you can call through BSNL 155300 and from other phones 0471-2115054,2115098.
Now you can see a folder in the project explorer having the name( here assume demo) that you have given. the directory structure for our application is given below.
create folder classes inside WEB-INF. Save all packages containing class files inside it.Also save struts.xml file inside this.
copy library files inside :demo\WEB-INF\lib
demo\WEB-INF > web.xml
create jsp files inside demo along with WEB-INF.
To run the project
1. Navigate to "Window -> Show View -> Other..." 2. Open "Server" and select "Servers". This will open a "Servers" tab, probably in your bottom tab panel. 3. Right-click in the new "Servers" tab and select "New -> Server" 4. Select the version of Tomcat you installed and click "Next" 5. Click "Browse" and locate your Tomcat installation, and click "Next" 6. If "demo" isn't already in the "Configured projects" column, move it over and click "Finished"
Now, you should be able to run and debug your project in Tomcat. The way I prefer to do this is to:
1. Right-click on the 'demo' project in the "Package Explorer" and select "Run As -> Run on Server" 2. Select the Tomcat server you set up and click "Finish"
public class DateDemo { public static void main(String[] args) { //Create scanner object to obtain input from user Scanner input = new Scanner (System.in);
int MonthNum; //To hold the month from user input int Year; //To hold the year int numDays; String Month;
System.out.print("Please enter the Month #"); MonthNum = input.nextInt(); System.out.print("Please enter the Year"); Year = input.nextInt();
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