simple algo going wrong

int k=0;
int n1;

while(pkey3!=0)
{

n1=pkey3%10;
k=k*10+n1*2;
pkey3=pkey3/10;
}


if(k!=0)

{
k=k+1111;
int k1=k%100;
k=k/100;
String k2=" "+k+"SR"+k1;

**********************************************
i am doing a project in jsp n mysql. As a part of it i need to generate a unique string as in the above code say "k2". for this we r taking an input from the jsppage say "pkey3". hope u understand the logic. but the problem i am facing here is for pkey3 values like 10,100,1000,20,200,2000...... and so on the value generated for k2 is the same... it should b unique. . so i need some modifications in the code. so please help me out to correct this code or suggest me a simple algorithm to generate a unique string.....

thanx in advance
regards
simres

if you want a unique number, why not use a timestamp - or a rand seeded with a microtime value.

christo

Varies by implementation, but something like:

srand (time (0)); (seed just once)

then use rand (). can be scaled with the modulus operator.

Actually, being that it's mysql, you'd define the field as and "auto increment"

Here's what I use: (taken from some code of mine)



Does it need to be a string? Does it need to be predictable from the k2?

hai all,
thanks for the response.but "k2" should be a string itself and it can,t be generated as autoincrement.....
so please help in this regard.
regards
simres

if you're doing this in Java, this class will do the job by the looks of things.

christo