RRVTechDiamond

Friday, August 9, 2013

Delete given character from text using javascript

a. Design a HTML page as below
b. You can take any sentence like the above diagram. Take only character from the user and remove the character from the given sentence and after clicking on “Click” button, display the sentence again after removing the character as below.
c. Validate for only characters.
d. Design a good looking HTML page.

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<script>
function clickCha(){
var inn=document.getElementById('1').innerHTML;

while(inn.search(document.getElementById('cha').value)!=-1){
inn=inn.replace(document.getElementById('cha').value,"");

}
var content=document.getElementById('tab').innerHTML;
content=content+inn;
document.getElementById('tab').innerHTML=content;
return true;

}
</script>
<body><center>
<form><fieldset style='border:solid;' id='tab'>
<p id='1'>We at Nacre have created an idea work environment wherenin every Nacrean adheres to set of rules and regulations practiced in the corporate world.This exposes team to corporate culture,leading to inculcation of professionalisam,integrity,time manangement,efficient delegation of work and optimal working strategies both individually and within teams.Nacreans adhere to the following rules and regulations.</p>

Enter a Character:
<input type='text' name='tex' id='cha' value=''>
<input type='button' id='cli' value='click'
onclick='return clickCha()'><br>
</fieldset>
</form></center>
</body>
</html>

Wednesday, July 31, 2013

How many ways are there to register JDBC driver with DriverManagerService

JDBC is used for to interact java application with Data Base Software.By using JDBC API database vendors are develop JDBC drivers.This JDBC driver class names are vary from Database to Database. This JDBC driver class name contains static method which contains logic to object for JDBC driver class and register this object with DriverManager Service. Generally we are using this process to register Driver class with DriverManager Service.But we can register our Driver class with DriverManager Service in so many ways.They are

Sun.jdbc.odbc.JdbcOdbcDriver obj=new Sun.jdbc.odbc.JdbcOdbcDriver();

DriverManager.registerDriver(obj);

This above code register JDBC driver twice with DriverManager Service.

(i)To static block of driver class when driver class object is created.

(ii) Explicitly when programmer calls DriverManager.registerDriver();

Sun.jdbc.odbc.JdbcOdbcDriver obj=new Sun.jdbc.odbc.JdbcOdbcDriver();

Here JDBC driver will be register DriverManager Service only once but programmer creates one explicit unused object for driver class.

3. DriverManager.registerDriver(new Sun.jdbc.odbc.JdbcOdbcDriver());

Limitations are same as approach 1

4. class.forName("Sun.jdbc.odbc.JdbcOdbcDriver");

static block of driver class registers jdbc driver with DriverManager service only once.

5. class.forName(args[0]);
>java javaclassname Sun.jdbc.odbc.JdbcOdbcDriver

Same as approach 4 but allows to pass JDBC driver class name from outside the application dynamically at runtime.

6. We can pass input value to Java application as System property value by using java -D option.To read this value our application can use System.getProperty() method.

>java _Dmy.driver=Sun.jdbc.odbc.JdbcOdbcDriver() javaclassname

7. The DriverManager class attempts to load the Driver classes automatically which are referenced in the System property called "jdbc.driver"

>java _Djdbc.drivers=Sun.jdbc.odbc.JdbcOdbcDriver() javaclassname
8. In the process of loading subclass the JVM automatically loads superclass will be executed automatically .The below process is not recommended it makes our class not extending from other useful classes like Thread,Frame,Applet.

Log4j with XML file

For executing Log4j programs,we are using properties file for configuring details of Log4j. In this post, we will configure Log4j details with XML file.And we can keep this file under src folder.

log4j.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

<appender name="myAppender" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.SimpleLayout"/>
</appender>
<root>
<priority value = "debug" />
<appender-ref ref = "myAppender"/>
</root>

</log4j:configuration>

Log4JJava.java :

package com.log4j;

import org.apache.log4j.Logger;
import org.apache.log4j.xml.DOMConfigurator;

public class Log4JJava{

static Logger log = Logger.getLogger(Log4JJava.class.getName());

public static void main(String[] args) {
/* By using DOMConfigurator.configure() method and passing xml file as argument */
DOMConfigurator.configure("log4j.xml");
/* call debug() method on log object and passing String message as argument */
log.debug("Debug");
log.info("Info");
}

}

Wednesday, July 17, 2013

Run Log4J program without Properties file

How run Log4j program without using Properties file?

We will write programs in two ways.

Type 1:
package com.log.appender;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import java.util.Properties;

public class Log4jPropr{
static Logger log = Logger.getLogger(Log4jPropr.class);

public static void main(String[] args) {

Properties log4jProperties = new Properties();
log4jProperties.setProperty("log4j.rootLogger", "INFO, myConsoleAppender");
log4jProperties.setProperty("log4j.appender.myConsoleAppender", "org.apache.log4j.ConsoleAppender");
log4jProperties.setProperty("log4j.appender.myConsoleAppender.layout", "org.apache.log4j.PatternLayout");
log4jProperties.setProperty("log4j.appender.myConsoleAppender.layout.ConversionPattern", "%-5p %c %x - %m%n");
PropertyConfigurator.configure(log4jProperties);
log.setLevel(Level.DEBUG);

log.debug("This is a debug message");
log.info("This is an info message");
}
}

Output:

DEBUG com.log.appender.Log4jPropr - This is a debug message

INFO com.log.appender.Log4jPropr - This is an info message

Type-2:

package com.log.appender;

import java.io.IOException;

import org.apache.log4j.DailyRollingFileAppender;
import org.apache.log4j.FileAppender;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;

public class Log
{
public static Logger as_looger;
public static void main(String[] args) {
as_looger = Logger.getLogger("articles logging");
as_looger = Logger.getLogger(Log.class.getName());
FileAppender as_appender = null;
try {
as_appender = new DailyRollingFileAppender(new PatternLayout("%d{dd-MM-yyyy HH:mm:ss} %C %L %-5p: %m%n"), "path of file where to write logs","'.'dd-MM-yyyy");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
as_looger.setLevel(Level.DEBUG);
as_looger.addAppender(as_appender);
}

}

Tuesday, July 16, 2013

Prime Numbers in javascript

	<HTML>
	<HEAD>
	<TITLE> Prime Number </TITLE>
	</HEAD>
	<script>
	var inum=prompt("Enter a Value");
	var a=new Array();

	var val=0;
	for(var ind = 1;ind<=inum;ind++){
	count = 0;

	for(i=2;i<=ind/2;i++){
	if(ind%i==0){
	count++;
	break;
	}
	}

	if(count==0 && ind!= 1){
	a[val]=ind;
	val++;
	}
	}
	var indVal=9;
	var inc=0;
	while(inc<a.length)
	{
	inc++;
	document.write("<font color='#"+ Math.floor(Math.random() * 16777215).toString(16)+"'>"+a[indVal]+"&nbsp&nbsp</font>");
	indVal--;
	if(inc%10==0)
	{
	document.write("<br>");
	indVal=inc+9;
	}
	if(indVal>a.length)
	{
	var temp=indVal-a.length;
	indVal=indVal-temp-1;
	}
	}
	</script>
	<body>
	</body>
	</html>

ImageSlideShow

Write a JavaScript program for ImageSlideShow?

Conditions:
a) Create a html page that has 10 images in it.
b) Create a slideshow that displays images with the gap of 2 seconds.
c) There should be counter on the screen that displays the total number of images, images already shown
and images left in the queue should also be shown as a status.
d) Display page content in the middle of the page in proper alignment
e) Try to prepare a good looking html page .
f) You are only allowed to use html for design the page and javascript for scripting logic.

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Slide Show</title>
<script>
var ind=0;
var pre=0;
function valid(){
setTimeout(function(){slide()},1000);
}
function slide()
{
if(ind<8){
var imgArr=["Blue hills.jpg","Sunset.jpg","Water lilies.jpg","Winter.jpg","Bluei.jpg","Bluei1.jpg","Bluei2.jpg","Bluei3.jpg"];
var content="<img src='"+imgArr[ind]+"' width='200' height='200'>";
document.getElementById('pp').innerHTML=content;
document.getElementById('pre').value=ind;
document.getElementById('now').value=ind+1;
document.getElementById('next').value=imgArr.length-ind-1;
ind=ind+1;

valid();
}
}

</script>
</head>
<body>
<form><div><p id='pp'><br><input type='button' id='sta' value='Start' onclick='return valid()'></p><br>
Previous <input type='text' id='pre'>
Present:<input type='text' id='now'>
Remain:<input type='text' id='next'>

</div></form>
</body>
</html>

Monday, July 15, 2013

RegistrationForm

	a. Design a HTML page as below fig. b. Validate above form field i. Name Field should not be empty. ii. Validate Name field for only characters and special symbols i.e.(A-Z a-z _ . ). iii. Validate Gender: At least choose one of Gender. iv. Above validation should happen on form submit, i.e. ‘Onclick’ on Submit Button c. Display form content in the middle of the page with proper alignment. d. Try to design a good looking html page. e. You are only allowed to use HTML for design the page and JavaScript for scripting logic. <html>
	<head>
	</head>
	<script>
	function checkForm()
	{
	var reg=/^[a-zA-z._]+$/;
	var user_name=document.getElementById("userName").value;
	var gen=document.getElementsByName('gender');
	var qualification=document.getElementsByName('qua');
	if(user_name=='')
	{
	alert("Please Enter Your Name");
	document.getElementById('userName').focus;
	return false;
	}
	//checking userName withregularExpression
	if(!user_name.match(reg))
	{
	alert("please enter alphabitical and symbols");
	}
	//checking options are selected or not
	if (document.getElementById('male').checked == false && document.getElementById('female').checked == false)
	{
	alert("Please select gender");
	}

	for(var ind=0;ind<qualification.length;ind++)
	{
	if(qualification[ind].checked==true)
	return true;
	}
	return false;


	alert("Your name is "+user_name);

	return true;

	}
	</script>

	<body><center><form name="regForm" id="res" onsubmit="return checkForm()">
	<div id="form" style="width:350px; background-color:green">
	<fieldset>
	<legend style="BackGround-color:blue;color:yellow;font-weight:bold;">RegistrationForm</legend>
	<table>
	<tr>
	<td>Name:<span style="color:red; ">*</span> <input type="text" name="userName" value="" style="border: 5px; bordercolor:red"></td></tr>
	<tr>
	<td>Gender:<b style="color:red">*</b>&nbsp<td bgcolor="red"><input type="radio" name="gender" id="male" value="Male">Male <input type="radio" name="gender" id="female" value="Female">Female </td>
	</tr>
	<tr>
	<td>Qualification:<b style="color:red">*</b></td><td bgcolor="yellow"><input type="radio" name="qua" id="bca" value="Male">BCA <input type="radio" name="qua" id="bsc" value="bsc">BSc</br><input type="radio" name="qua" id="bca" value="Mca">MCA <input type="radio" name="qua" id="mtech" value="mtech">Mtech </td>
	</tr>

	<tr>
	<td colsapn="2" align="center"><input type="submit" name="reges" id="regist" value="Submit"></td>
	</tr>
	</table>
	</fieldset>
	</div></form>
	</center></body>
	</html>

Friday, August 9, 2013

Wednesday, July 31, 2013

Wednesday, July 17, 2013

Tuesday, July 16, 2013

Monday, July 15, 2013

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