JSF - Random Number using Beans (JAVA)
- by Alex Encore Tr
I am trying to create a jsf application which, upon page refresh increments the hit counter and generates two random numbers. What should be displayed on the window may look something like this:
On your On your roll x you have thrown x and x
For this program I decided to create two Beans, one to hold the page refresh counter and one to generate a random number. Those look like this for the moment:
CounterBean.java
package diceroll;
public class CounterBean
{
int count=0;
public CounterBean()
{
}
public void setCount(int count)
{
this.count=count;
}
public int getCount()
{
count++;
return count;
}
}
RandomNumberBean.java
package diceroll;
import java.util.Random;
public class RandomNumberBean {
int rand=0;
Random r = new Random();
public RandomNumberBean()
{
rand = r.nextInt(6);
}
public void setNextInt(int rand)
{
this.rand=rand;
}
public int getNextInt() {
return rand;
}
}
I have then created an index.jsp to display the above message.
<html>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<f:view>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Roll the Dice</title>
</head>
<body>
<h:form>
<p>
On your roll #
<h:outputText value="#{CounterBean.count} " />
you have thrown <h:outputText value="#{RandomNumberBean.rand}" />and <h:outputText value="#{RandomNumberBean.rand} " />
</p>
</h:form>
</body>
</f:view>
</html>
However, when I run the application, I get the following message:
org.apache.jasper.el.JspPropertyNotFoundException: /index.jsp(14,20) '#{RandomNumberBean.rand}' Property 'rand' not found on type diceroll.RandomNumberBean
Caused by:
org.apache.jasper.el.JspPropertyNotFoundException - /index.jsp(14,20) '#{RandomNumberBean.rand}' Property 'rand' not found on type diceroll.RandomNumberBean
I suppose there's a mistake with my faces-config.xml file, so I will post this here as well, see if somebody can provide some help:
faces-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<faces-config
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd"
version="2.0">
<managed-bean>
<managed-bean-name>CounterBean</managed-bean-name>
<managed-bean-class>diceroll.CounterBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
<managed-bean>
<managed-bean-name>RandomNumberBean</managed-bean-name>
<managed-bean-class>diceroll.RandomNumberBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
</faces-config>
