Using Session Objects - effective or is there better ways?
Hi Guys,
I am currently working with a j2EE application which is heavily configured to particular users details. Additionally it hosts a customised Content Management system, which allow dynamic content to be displayed.
It asks a series of questions, they next set of question to show are dependent on the users selected choice. e.g.
1) what is your type of request (drop down menu)
- New User (if selected show question 22)
- Delete user (if selected show question 5)
I am heavily making use of Seesion variables to store what the user has answered, Additionall functionality allows the user to go back a question, so all possible values must be stored.
Is there a more effective way of handling this, I think having multiple session variables may have some draw-backs?
thanks
Manj
The Time Capsule (TC) can have its wireless network extended by another TC, an 802.1n AirPort Extreme Base Station (AEBSn), or 802.11n AirPort Express Base Station (AXn).
If your TC is a simultaneous dual-band version, only another TC or AEBSn will be able to extend both radios. The AXn can only support one radio (2.4 or 5 GHz) at a time.
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marry christmas
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Message was edited by:
rachna_arora82hi rachna,
JSP has a default(implicit) session object...... use the getSession(true) method on the session object and then going u can either get or set attributes depending on the requirement
That was in general and now with the issue u have got..... what u can do is that the u can create session for every user who logs in and when he/she tries to login again then u can probably check for the existing session object in the JSP and perform the logic as required..... any clarifications plzzzzzzz let me know
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Message was edited by:
Novice_inJAVA
Message was edited by:
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I am running out of ideas while working on one scenario and thought you guys would be able to guide me in right way.
So, the scenario is I have a Table table1 table1(fieldkey, DisplayName, type) fieldkey - pkey This table have n number of rows. The value of fieldkey in nth row is n. So if we have 1000 record, then the last row has a fieldkey = 1000.
Below is my sample data.
Insert into table1 (FIELDKEY,DISPLAYNAME,TYPE) values
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Insert into table1 (FIELDKEY,DISPLAYNAME,TYPE) values
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Insert into table1 (FIELDKEY,DISPLAYNAME,TYPE) values
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Insert into table1 (FIELDKEY,DISPLAYNAME,TYPE) values
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Insert into table1 (FIELDKEY,DISPLAYNAME,TYPE) values
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Insert into table1 (FIELDKEY,DISPLAYNAME,TYPE) values
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So, I thought of using the max(fieldkey) +1 from that table and use it in my insert script. This script file runs every time during software installation.
I thought of using count to see if the row with same displaytype and type exists in that table or not. If exisits do not insert new row, if not insert new row.
It looks like i will have to query the count statement everytime before I insert the row.
select max(fieldkey) +1 into ll_fieldkey from table1
select count(*) into ll_count from table1 where display ltrim(upper(name)) = 'COFFICER' and type =100)
if ll_count >0 then
Insert into table1 (FIELDKEY,DISPLAYNAME,TYPE) values
( ll_fieldkey, 'COfficer',100);
ll_fieldkey := ll_fieldkey +1
end if;
select count(*) into ll_count from table1 where display ltrim(upper(name)) = 'PData' and type =100)
if ll_count >0 then
Insert into table1 (FIELDKEY,DISPLAYNAME,TYPE) values
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ll_fieldkey := ll_fieldkey +1
end if;
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You can fill with values a nested table and then use forall ... save exceptions insert and with above mentioned UK , maybe this will be better.
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Edited by: ttt on 10.3.2010 13:01 -
Hi! To check which input for the population is lower I used double min and double max. But while loop for counting years is not working. What is better way to do it?
I'd appreciate any help you can give.
Thanks.
Program asks for data on two species and has to respond by telling how many years it will
take for the species with lower
population outnumber the species that starts with higher population.
class SpeciesTry
private String name1;
private String name2;
private int population1;
private int population2;
private double growthRate1;
private double growthRate2;
public void readInput( )
System.out.println("What is the first species' name?");
name1 = SavitchIn.readLine( );
System.out.println("What is the population of the species?");
population1 = SavitchIn.readLineInt( );
while (population1 < 0)
System.out.println("Population cannot be negative.");
System.out.println("Reenter population:");
population1 = SavitchIn.readLineInt( );
System.out.println("Enter growth rate (percent increase per year):");
growthRate1 = SavitchIn.readLineDouble( );
System.out.println("What is the second species' name?");
name2 = SavitchIn.readLine( );
System.out.println("What is the population of the species?");
population2 = SavitchIn.readLineInt( );
while (population2 < 0)
System.out.println("Population cannot be negative.");
System.out.println("Reenter population:");
population2 = SavitchIn.readLineInt( );
System.out.println("Enter growth rate (percent increase per year):");
growthRate2 = SavitchIn.readLineDouble( );
public void writeOutput( )
System.out.println("Name of the species' = " + name1);
System.out.println("Population = " + population1);
System.out.println("Growth rate = " + growthRate1 + "%");
System.out.println("Name of the species' = " + name2);
System.out.println("Population = " + population2);
System.out.println("Growth rate = " + growthRate2 + "%");
public void outnumbersPopulation()
double max=0; double min=0; double minGrowthRate=0; double maxGrowthRate=0;
String maxName=null; String minName=null;
int years=0;
if ((population1<=population2)&(growthRate1<=growthRate2))
System.out.println("The species " + name1 + " will never outnumber the species " + name2 );
System.exit(0);
else if ((population2<=population1)&(growthRate2<=growthRate1))
System.out.println("The species " + name2 + " will never outnumber the species " + name1 );
System.exit(0);
if((population1>population2)&(growthRate1<growthRate2))// this is to determine which population is smaller
max=population1;
maxName=name1;
maxGrowthRate=growthRate2;
min=population2;
minGrowthRate=growthRate1;
minName=name2;
if ((population2>population1) &(growthRate2<growthRate1))
max=population2;
maxName=name2;
maxGrowthRate=growthRate1;
min=population1;
minName=name1;
minGrowthRate=growthRate2;
while ( (min <=max) & (years > 0) )
min= (min +((minGrowthRate/100) * min));
max=(max + ((maxGrowthRate/100) * max));
years ++;
System.out.println("The species " + minName + " will outnumber the species " + maxName +
" in " + (years+1) + " years");
public class Species
public static void main(String[] args)
SpeciesTry s1= new SpeciesTry();
s1.readInput();
s1.writeOutput();
s1.outnumbersPopulation();
}I'm new to Java and posting. So, here's my program again with outnumberPopulation() method formated. Is there any hope for this program?
class SpeciesTry
private String name1;
private String name2;
private int population1;
private int population2;
private double growthRate1;
private double growthRate2;
public void readInput( )
System.out.println("What is the first species' name?");
name1 = SavitchIn.readLine( );
System.out.println("What is the population of the species?");
population1 = SavitchIn.readLineInt( );
while (population1 < 0)
System.out.println("Population cannot be negative.");
System.out.println("Reenter population:");
population1 = SavitchIn.readLineInt( );
System.out.println("Enter growth rate (percent increase per year):");
growthRate1 = SavitchIn.readLineDouble( );
System.out.println("What is the second species' name?");
name2 = SavitchIn.readLine( );
System.out.println("What is the population of the species?");
population2 = SavitchIn.readLineInt( );
while (population2 < 0)
System.out.println("Population cannot be negative.");
System.out.println("Reenter population:");
population2 = SavitchIn.readLineInt( );
System.out.println("Enter growth rate (percent increase per year):");
growthRate2 = SavitchIn.readLineDouble( );
public void writeOutput( )
System.out.println("Name of the species' = " + name1);
System.out.println("Population = " + population1);
System.out.println("Growth rate = " + growthRate1 + "%");
System.out.println("Name of the species' = " + name2);
System.out.println("Population = " + population2);
System.out.println("Growth rate = " + growthRate2 + "%");
public void outnumbersPopulation()
double max=0; double min=0; double minGrowthRate=0; double maxGrowthRate=0;
String maxName=null; String minName=null;
int years=0;
if( population1>population2)// this is to determine which population is smaller
{ max=population1;
maxName=name1;
maxGrowthRate=growthRate2;
min=population2;
minGrowthRate=growthRate1;
minName=name2;
else
max=population2;
maxName=name2;
maxGrowthRate=growthRate1;
min=population1;
minName=name1;
minGrowthRate=growthRate2;
if (minGrowthRate<=maxGrowthRate)
System.out.println(minName+" will never grow larger than "+maxName);
return;
while ( (min <=max) & (years > 0) )
min= (min +((minGrowthRate/100) * min));
max=(max + ((maxGrowthRate/100) * max));
System.out.println("Check" + max + min);
years ++;
System.out.println("The species " + minName + " will outnumber the species " + maxName +
" in " + (years+1) + " years");
public class Species
public static void main(String[] args)
SpeciesTry s1= new SpeciesTry();
s1.readInput();
s1.writeOutput();
s1.outnumbersPopulation();
} -
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