Can't Create Bean Error
I modified the numguess example that comes with tomcat but I get a "can't create bean" error message when I call my jsp file. If anyone can see what I'm doing wrong or suggest ways to discover the problem I'd appreciate it.
My modified jsp:
<!--
Copyright (c) 1999 The Apache Software Foundation. All rights
reserved.
Number Guess Game
Written by Jason Hunter, CTO, K&A Software
http://www.servlets.com
-->
<%@ page import = "num.NumberGuessBean" %>
<jsp:useBean id="numguess" class="num.NumberGuessBean" scope="session"/>
<jsp:setProperty name="numguess" property="*"/>
<html>
<head><title>Number Guess</title></head>
<body bgcolor="white">
<font size=4>
<% if (numguess.getSuccess()) { %>
Congratulations! You got it.
And after just <%= numguess.getNumGuesses() %> tries.<p>
<% numguess.reset(); %>
Care to <a href="numguess.jsp">try again</a>?
<% } else if (numguess.getNumGuesses() == 0) { %>
Welcome to the Number Guess game.<p>
Play with default limits ( a number between 0 and 100)<p>
or enter upper and lower limits.<p>
<form method=get>
Play with defaults?: <input type=radio name=default value="yes">Yes
<input type=radio name=default value="no">No
<\form>
<% if (numguess.getRadio().equals("no")) { %>
<form method=get>
Enter upper limit:<input type=text name=upperLimit>
Enter lower limit:<input type=text name=lowerLimit>
<\form>
<% numguess.reset(); %>
<% } %>
<form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>
<% } else { %>
Good guess, but nope. Try <b><%= numguess.getHint() %></b>.
You have made <%= numguess.getNumGuesses() %> guesses.<p>
I'm thinking of a number between <jsp:getProperty name="numguess" property="lowerLimit"/> and <jsp:getProperty name="numguess" property="upperLimit"/>.<p>
<form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>
<% } %>
</font>
</body>
</html>
and the modified bean:
/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*notice, this list of conditions and the following disclaimer in
*the documentation and/or other materials provided with the
*distribution.
*
* 3. The end-user documentation included with the redistribution, if
*any, must include the following acknowlegement:
*"This product includes software developed by the
*Apache Software Foundation (http://www.apache.org/)."
*Alternately, this acknowlegement may appear in the software itself,
*if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
*Foundation" must not be used to endorse or promote products derived
*from this software without prior written permission. For written
*permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
*nor may "Apache" appear in their names without prior written
*permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
/*
* Originally written by Jason Hunter, http://www.servlets.com.
*/
package num;
import java.util.*;
public class NumberGuessBean {
int answer;
boolean success;
String hint;
int numGuesses;
String radiochoice;
int lowerLimit=0;
int upperLimit=100;
String error;
public NumberGuessBean() {
reset();
}
public void setGuess(String guess) {
numGuesses++;
int g;
try {
g = Integer.parseInt(guess);
}
catch (NumberFormatException e) {
g = -1;
}
if (g == answer) {
success = true;
}
else if (g == -1) {
hint = "a number next time";
}
else if (g < answer) {
hint = "higher";
}
else if (g > answer) {
hint = "lower";
}
}
public void setRadio(String s) {
radiochoice=s;
}
public String getRadio() {
return radiochoice;
}
public void setLowerLimit( int lowerLimit) {
this.lowerLimit=lowerLimit;
}
public int getLowerLimit() {
return lowerLimit;
}
public void setUpperLimit(int upperLimit) {
this.upperLimit=upperLimit;
}
public int getUpperLimit() {
return upperLimit;
}
public boolean getSuccess() {
return success;
}
public String getHint() {
return "" + hint;
}
public String getError() {
return ""+error;
}
public int getNumGuesses() {
return numGuesses;
}
public void reset() {
if (getRadio().equals("yes")) {
answer = (int)(Math.random()*100);
}
else {
int i;
i=(int)(Math.random()*upperLimit);
if (i<lowerLimit) {
i=i+lowerLimit;
}
answer=i;
}
success = false;
numGuesses = 0;
}
}
>
