### Popular Logics for implementation to check basic skills of fresher

Factorial
long Factorial( int n ) {
if ( n>0 )
return( n * Factorial(n-1) );
else
return( 1 );
}
Fibonacci
int Fibonacci( int n ) {
if ( n==1 || n==2 )
return( 1 );
else
return( Fibonacci(n-1) + Fibonacci(n-2) );
}
GCD
int GCD( int a, int b )
{
if ( a>=b && a%b==0 )
return( b );
else if ( a<b )
return( GCD( b, a ) );
else
return( GCD( b, a%b ) );
}
Power
double Power( double x, int n ) {
if ( n==0 )
return( 1 );
else if ( n>0 )
return( x * Power( x, n-1 ) );
else
return( (1/x) * Power( x, n+1 ) );
}
Reverse Printing
void ReverseChar( void ) {
char ch;
if ( (ch=getchar( ))!='n' )
ReverseChar( );
putchar( ch );
}
Decimal to binary conversion
void ToBin( int n ) /*
{
if (n>1)
ToBin( n/2 );
printf( "%d", n%2 );
}
void ToHex( int n )
{
char *htab[ ] = { "0", "1", "2", "3", "4", "5", "6", "7", "8","9", "A", "B", "C", "D", "E", "F" };
if (n>15)
ToHex( n/16 );
printf( "%s", htab[n%16] );
}
Printing a decimal in words
void InWord( int n ) {
char *wtab[ ] = { "Zero", "One", "Two", "Three", "Four","Five", "Six", "Seven", "Eight", "Nine" };
if (n>9)
InWord( n/10 );
printf( "%s ", wtab[n%10] );
}

### Using HyperSQL (HSQLDB)

HSQLDB is a portable RDBMS implemented in pure java. It can be embedded with your application as well as can be used separately. It is very a small database that supports almost all features of the standard database system. It comes with small jar file that can be found in lib folder. The HSQLDB jar package is located in the /lib directory of the ZIP package and contains several components and programs. Core components of jar file are : HyperSQL RDBMS Engine (HSQLDB), HyperSQL JDBC Driver, Database Manager, and Sql Tool. Installing and Using Download: download latest release of HyperSQL database from http://hsqldb.org website and extract it. You will see following contents. Here "bin" directory contains some batch files those can be used to run a swing based GUI tool. You can use runManagerSwing.bat to connect to database, but database must be on before running it. Directory lib contains File hsqldb.jar . It is the database to be used by you. Running database First

### How to handle values from dynamically generated elements in web page using struts2

Some time you will see the form containing the button " Add More " . This facility is provided for the user to get the values for unknown number of repeating for some information. for example when you are asking to get the projects details from user, you need to put the option to add the more project for the user since you don't known how many projects user have. In the HTML form, you repeat the particular section to get the multiple values for those elements. In Html page , you can put the option to add new row of elements or text fields by writing the java script or using JQuery API. Now, the question is that how to capture the values of dynamically generated text fields on the server. Using the servlet programming you can get the values by using getParameters() method that resultants the array of the parameter having the same name. But this limit you to naming the text fields in the HTML form. To ally this approach, you have to take the same name for t

### Generating JTable from database table

package  process; import  javax.swing. * ; import  javax.swing.table. * ; import  java.sql. * ; /**  * This class create JTable from Database table.  * User program needs to specify database connection and corresponding atable name.  * @author Hemraj  */ public   class  TableToJTable {      //private String table;      private   Connection  con;      public   TableToJTable ( Connection  con ){          this .con = con;      }      /**      * This method return JTable object created from Database table having same data asn structure      * as in original table into database.      * @param table Name of the database table to be coverted to JTable      * @return JTable object that consist of data and structure of Database table      * @throws java.lang.Exception Original object is deferent, e.i either SQLException or NullPointerException      */      public   JTable   getTable ( String  table ) throws   Exception {          JTable  t1 = new   JTable () ;          D