November 16th, 2008 
admin Open a File in Runtime in Java:
1.Create a Object For Process
2.exec is a method to open a File in Runtime
3.In the exec Method, we can give all the command which can be give in the Run Window
4.If it cannot Work,Copy Exe File and Paste it in C:\Windows\System32
Popularity: 1% [?]
November 14th, 2008 admin The if tag allows the conditional execution of its body according to the value of the test attribute
<c:if test=”${empty details.add}”>
It is a Empty ArrayList
</c:if>
The choose tag performs conditional block execution by the embedded when subtags. It renders the body of the first when tag whose test condition evaluates to true. If none of the test conditions of nested when tags evaluates to true, then the body of an otherwise tag is evaluated, if present.
Popularity: 1% [?]
November 10th, 2008 admin How to Connect Java with Sql Server :
1.import sql package
2.Give all the Supporting class in class.forName
3.Give Ipaddress or Computer Name in dburl or in getConnection
4.Use 1433 port Number as Default Port.
5.Give Username and Password in getConnection
6.Open the Connection using createStatement
7.Execute the query String using executeQuery Statement
8.Fetch the Record one by one Using ResultSet
9.Close the Connection
public static void main(String[] args)
{
try {
Class.forName( “com.microsoft.jdbc.sqlserver.SQLServerDriver” );
con=DriverManager.getConnection(dburl,username,pwd);
stmt=con.createStatement();
rs=stmt.executeQuery(”SELECT * FROM demo”);
while(rs.next())
{
String name=rs.getString(1);
}
}
catch(SQLException sqlExcp)
{
sqlExcp.printStackTrace();
}
}
}
Popularity: 1% [?]
November 10th, 2008 admin 1.import sql package
2.Give all the Supporting class in class.forName
3.Give Ipaddress or Computer Name in dburl or in getConnection
4.Give Username and Password in getConnection
5.Open the Connection using createStatement
6.Execute the query String using executeQuery Statement
7.Fetch the Record one by one Using ResultSet
8..mysqldemo is a schema name
9.Close the Connection
import java.io.*;
import java.sql.*;
public class MysqlConnection
{
public static String dburl=”jdbc:mysql://localhost/mysqldemo”;
public static String username=”root”;
public static String pwd=”root”;
public static Connection con=null;
public static Statement stmt=null;
public static ResultSet rs=null;
public static void main(String[] args)
{
try {
Class.forName(”org.gjt.mm.mysql.Driver”);
(or)
Class.forName(”com.mysql.jdbc.Driver”);//use this
con=DriverManager.getConnection(dburl,username,pwd);
stmt=con.createStatement();
rs=stmt.executeQuery(”SELECT * FROM demo”);
while(rs.next())
{
String name=rs.getString(1);
}
}
catch(SQLException sqlExcp)
{
sqlExcp.printStackTrace();
}
}
}
Popularity: 1% [?]
November 8th, 2008 admin Different Taglibs and its Usuage in JSP:
1.Core:http://java.sun.com/jsp/jstl/core
This Taglibs is used for Looping,Variable Support,Flow control,URL Management and miscellaneous
2.XML:http://java.sun.com/jsp/jstl/xml
This Taglibs is Used for Core,Flow Control and Transformation
3.Internationalization:http://java.sun.com/jsp/jstl/fmt
This Taglibs is Used For Locale, Message formatting and Number & date formatting
4.SQL:http://java.sun.com/jsp/jstl/sql
This Taglibs is Used For Sql Query Purpose
5.Functions:http://java.sun.com/jsp/jstl/functions
This Taglibs is Used For Collection length and String manipulation
Popularity: 2% [?]
November 3rd, 2008 admin Reflection in java:
Reflection is the mechanism by which Java exposes the features of a class during runtime, allowing Java programs to enumerate and access a class’ methods, fields, and constructors as objects. In other words, there are object based mirrors which reflect the Java object model, and you can use these objects to access an object’s features using runtime API constructs instead of compile time language constructs.
Each object instance has a getClass() method, inherited from java.lang.Object, which returns an object with the runtime representation of that object’s class; this object is an instance of the java.lang.Class.This object in turn has methods which return the fields, methods, constructors, superclass, and other properties of that class.
You can use these reflection objects to access fields, invoke methods, or instantiate instances, all without having compile time dependencies on those features. The Java runtime provides the corresponding classes for reflection. Most of the Java classes which support reflection are in the java.lang.reflect package.
Accessing Private Features with Reflection:
All features of a class can be obtained via Reflection, including Access to private methods & variables.Setting the Accessible flag in a reflected object of java.lang.reflect.AccessibleObject class allows us to read/modify a private variable that we normally wouldn’t have permission to. However, the access check can only be supressed if approved by installed SecurityManager.
The Classes java.lang.reflect.Field, java.lang.reflect.Method and java.lang.reflect.Constructor can inherit this behavior from java.lang.reflect.AccessibleObject class. The following example demonstrates read/modify access to a private variable which is normally inaccessible.
SimpleKeyPair.java
public class SimpleKeyPair {
private String privateKey = “Welcome SimpleKeyPair “; // private field
}
PrivateMemberAccessTest.java
import java.lang.reflect.Field;
public class PrivateMemberAccessTest {
public static void main(String[] args) throws Exception {
SimpleKeyPair keyPair = new SimpleKeyPair();
Class c = keyPair.getClass();
// get the reflected object
Field field = c.getDeclaredField(”privateKey”);
// set accessible true
field.setAccessible(true);
System.out.println(”Value of privateKey: ” + field.get(keyPair));
/* prints “Welcome SimpleKeyPair */
// modify the member varaible
field.set(keyPair, “Welcome PrivateMemberAccessTest”);
System.out.println(”Value of privateKey: ” + field.get(keyPair));
/* prints “PrivateMemberAccessTest” */
}
}
Output
=====
Value of privateKey: Welcome SimpleKeyPair
Value of privateKey: PrivateMemberAccessTest
Popularity: 11% [?]
November 2nd, 2008 admin Compare two ArrayList:
1.ArrayList are ListOfData and SecondList
2.Include this tag in the JSP Page
3.Find the Length of the ArrayList Using fn:length tag
4.Compare the ArrayList as
<tr>
<c:if test=”${SecondList[j].empid==ListOfData[i].empid}”>
<td>${ListOfData[i].empid} </td>
<td>${ListOfData[i].empname} </td>
<td>${ListOfData[i].empdest} </td>
</c:if>
</tr>
</c:forEach>
</c:forEach>
</c:if>
Popularity: 2% [?]
October 30th, 2008 admin What is Spring Framework?
Spring is grate framework for development of Enterprise grade application. Spring is a light-weight framework for the development of enterprise-ready applications. Spring can be used to configure declarative transaction management, remote access to your logic using RMI or web services, mailing facilities and various options in persisting your data to a database.Spring framework can be used in modular fashion, it allows to use in parts and leave the other components which is not required by the application.
Popularity: 1% [?]
October 30th, 2008 admin Popularity: 1% [?]
October 28th, 2008 admin Find a String within a String:
Search a String “a Nice” is Exist or Not within a String “Have a Nice Day” in JAVA
Coding:
Popularity: 1% [?]
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