found String rquired int

[raji toor]

<jsp:useBean id="data" class="com.custom.util.DataCollector" scope="request"/>
<c:set target="${data}" property="IP1" value="${param.subnet1}" />

this passes a return value of type String to property IP1. so it threw IllegalArgumentException for this function.

public void setIP1(int ip1){
this.ip1 = ip1;
}

bean specs definne that getIP1() method should return String if i use String as argument for setIP1(). But i want to manipulate them as int's not strings what should i do.

[Christophe Verré]

Bean specs definne that getIP1() method should return String

Does it ? Where did you read this ? If your ip1 variable is an int, it's getter should be :

int getIp1() {
  return ip1;
}

By the way, you should avoid mixing upper/lower case that way, or you'll get troubles with beans. You'd better rename your instance variable to "ip1", and declare setIp1 and getIp1.

[raji toor]

I think i am misunderstood
According to this code I get IllegalArgumentException

<jsp:useBean id="data" class="com.custom.util.DataCollector" scope="request"/>
<c:set target="${data}" property="IP1" value="${param.subnet1}" />

and this function in my class

public void setIP1(int ip1)
{this.ip1 = ip1;}

but when i changed my functions to below it went well. I had also to change ip1 instance variable to String.

void setIP1(String ip1){
this.ip1=ip1}    

String getIp1() 
{  return ip1;}    

[Christophe Verré]

You should be able to user integers too.

IllegalArgumentException

What is the value of param.subnet1 ?
[ June 19, 2007: Message edited by: Satou kurinosuke ]

[raji toor]

i have allowed values form 0 to 255 to be input in the form

<tbody>
                    <tr>
                        <td>IP Address:</td>
                        <td><input type="text" name="subnet1" value="" size="3" maxlength="3"/></td>
                        <td><input type="text" name="subnet2" value="" size="3" maxlength="3"/></td>                        
                        <td><input type="text" name="subnet3" value="" size="3" maxlength="3"/></td>                         
                        <td><input type="text" name="subnet4" value="" size="3" maxlength="3"/></td>                         
                    </tr>
                        <tr><td></td>
                        <td><c:set var="ch" value="1"/>
                            <c:if test="${param.subnet1<0 || param.subnet1>255 || empty param.subnet1   }" >
                            <c:set var="ch" value="0"/> 
                            invalid
                        </c:if></td>
                        <td><c:if test="${param.subnet2<0 || param.subnet2>255 || empty param.subnet2   }" >
                            <c:set var="ch" value="0"/>
                            invalid
                        </c:if></td>
                        <td><c:if test="${param.subnet3<0 || param.subnet3>255 || empty param.subnet3   }" >
                            <c:set var="ch" value="0"/>
                            invalid
                        </c:if></td>
                        <td><c:if test="${param.subnet4<0 || param.subnet4>255 || empty param.subnet4   }" >
                            <c:set var="ch" value="0"/>
                            invalid
                        </c:if></td>
                    </tr>
                </tbody>    

[Christophe Verré]

comment that line :

<c:set target="${data}" property="IP1" value="${param.subnet1}" />

and try this instead :

Value of subnet1 : ${param.subnet1}

Check what is being printed. I have a feel that your subnet1 is null/empty. It may happen the first time you access the page (which means that subnet1 has not been submitted yet)