File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Beginning Java and the fly likes what does this mean? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Beginning Java
Bookmark "what does this mean?" Watch "what does this mean?" New topic

what does this mean?

willl smith

Joined: Dec 03, 2004
Posts: 2
convert code into a method with header:

I just wrote a code to multiply two polynomials together but I dont know what it means to convert it into a method with a header, thanks..

public class MultPoly // tests multiplication of two polynomials

public static void main (String[] args)

int[] p = {2, 5, 3, 4};
int m = p.length - 1; // degree of p
int[] q = {4, 6, 8};
int n = q.length - 1; // degree of q
int[] r = new int [m + n + 1];// This will store the product.

for (int i = 0; i < p.length; i++)
{ //increments leading coefficient
for (int x=0; x < q.length; x++)
r[i + x] += (p[i] * q[x]);

int k;

for (k = 0; k < r.length - 1; k++)
System.out.print (r[k] + ", ");
System.out.println (r[k] + "."); // prints out final digit of polynomial


Barry Higgins
Ranch Hand

Joined: Jun 05, 2003
Posts: 89
I would assume this means to extract the functionality that relates explicitly to the multiplication of polynomials and place that into a function and pass the values as needed to this function.
What you have at the moment is a lump of code that will only calculate for one set of particular values and makes it difficult to reuse the benefits of code already written without rewriting substantial amounts of it.

To get you started the declaration of this would look something like

With reagrds to the header I don't know what that is .. Java doesn't use header filesperhaps you can get some clarification from whoever assigned you this project!
I agree. Here's the link:
subject: what does this mean?
It's not a secret anymore!