Can I put a class into a jsp??

Question

I want to put this class into a jsp.. and reference it when I need it... can i just dumped it into a jsp... or do I have to do anything specific to it...
public class areaformat {
     public synchronized static String replace(String str, char oldchar, String newstr)     {
          StringBuffer sb = new StringBuffer(str);
          int len = sb.length();
          try     {
               for (int i=0; i<=len; i++)     {
                    if (sb.charAt(i) == oldchar)     {
                         sb = sb.replace(i, i, newstr);
                         sb.deleteCharAt(i + newstr.length());
                         i = i + newstr.length() - 1;
          }catch(StringIndexOutOfBoundsException sioobe)     {
               if (len == 1 && str.equals("'")) {
                    sb = new StringBuffer(newstr);
          return sb.toString();
Thx RIch

Answer 1

No, you can't. You can put only the function in the beginning of your jsp file like:
<%!
public void myFunction(...){
%>
So, you can use myFunction wherever you want in the page.
The other method is to compile your class in a file called "javac className.java" and the put the .class file generated in your WEB-INF/classes folder of your web-container.