Java Programming

I have tested my code as java file, it works fine. However, when I try to use that as java beans, I am having this error message:
"An error occurred at line: 49 in the jsp file: /delete.jsp
Generated servlet error:
The method print(boolean) in the type JspWriter is not applicable for the arguments (void)"
I have tried deleting (tmp and work folder) files for _jsp, same error message once the application server(JBoss) compiles the jsp files.
I have also tried using the code as servelet but it then shows me messages related to import statements I am using in the code. (I am using "File" class of java to delete certain files from a folder). The bean I am using is:
package formjavabean ;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class Delete
{
public void deletion() //throws IOException
{

int i = 0 ;
String hold[] = {"ftn03", "ftn07", "ftn09"} ;

while (i < 3)
{
String fileName = "c:\\JBoss\\jboss-4.0.5.GA\\bin\\Fastran\\" + hold ;
File f = new File(fileName) ;
f.delete() ;
i++ ;
}

}
}
Then I am creating an instance of this(converted to byte code .class) in my jsp page as
<jsp:useBean class = "formjavabean.Delete" id = "DeleteId" scope = "session" /> in the head section of html tags, and then i am calling the method in the body tag of html as:
<%= DeleteId.deletion() %>
When I run the application, I get the error message listed above, and once again here as :
An error occurred at line: 49 in the jsp file: /delete.jsp
Generated servlet error:
The method print(boolean) in the type JspWriter is not applicable for the arguments (void)
thanks in advance for any help.