PrimeTag.java Custom tag that outputs a random prime number of a user-specifiable approximate length
package cwp.tags;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;
/** Generates an N-digit random prime (default N = 50).
* Extends SimplePrimeTag, adding a length attribute
* to set the size of the prime. The doStartTag
* method of the parent class uses the len field
* to determine the approximate length of the prime.
* <P>
* Taken from Core Web Programming Java 2 Edition
* from Prentice Hall and Sun Microsystems Press,
* .
* May be freely used or adapted.
*/
public class PrimeTag extends SimplePrimeTag {
public void setLength(String length) {
try {
len = Integer.parseInt(length);
} catch(NumberFormatException nfe) {
len = 50;
}
}
}