SimplePrimeTag.java Custom tag that outputs a random prime number of a fixed approximate length
package cwp.tags;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;
import java.math.*;
import cwp.*;
/** Generates a prime of approximately 50 digits.
* (50 is actually the length of the random number
* generated -- the first prime above that number will
* be returned.)
* <P>
* Taken from Core Web Programming Java 2 Edition
* from Prentice Hall and Sun Microsystems Press,
* .
* May be freely used or adapted.
*/
public class SimplePrimeTag extends TagSupport {
protected int len = 50;
public int doStartTag() {
try {
JspWriter out = pageContext.getOut();
BigInteger prime = Primes.nextPrime(Primes.random(len));
out.print(prime);
} catch(IOException ioe) {
System.out.println("Error generating prime: " + ioe);
}
return(SKIP_BODY);
}
}
Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10275
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:31
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