help on optimizing java code

[midnight_falcon]

Could you help me optimize the following fragment of java code please?

For (i=0; i<=9999; i=i+1)
{
for(j=0;j<=9999;j=j+1)
{
if (a[i,j]>0 && b>0)
{
a[i,j]=a[i,j]*2 + b;
}
}
}

Thankyou

also can i just ask, could you tell me the purpose and give short examples of the input/output of the following programs.

1. the LEX in lexical analysis
2. the YACC in syntactical analysis

Thankyou again

[Black Box]

It might be easier to optimize once we know what it is that you're trying to do. We can see you're checking every item of a (10 000 x 10 000) table and replacing its value. But what is it for, why are you doing that? If you could give us some more context, we could maybe suggest a totally different approach.

Black Box

[midnight_falcon]

I just got some college work and all the teacher gave me was this code- and i had to optimize it, i wasn't sure how to optimize it either.. so any help will do.

Thanks in advance.