Hi,

I dont know why my page shows this error. Please give a solution. My VF page is like as below


<apex:page standardController="Interrogate__c" extensions="ApsTestController">
    <apex:form >
        <apex:pageBlock >
            <apex:pageBlockSection >
                1. A compiler converts the Java program into an intermediate language representation called ____________.<br></br>
                         <apex:selectradio >
                          <apex:selectOptions value="{!X1optionsbelow}"/><br></br><br></br>
                           </apex:selectradio>
                        
                       2. _____________ operator is used to create an object.<br></br>
                            <apex:selectradio >
                           <apex:selectOptions value="{!x2optionsbelow}"/>
                           </apex:selectradio>
                       
            </apex:pageBlockSection>
                <apex:pageBlockButtons location="bottom">
                 <apex:commandButton value="Finish" action="{!save1}" />
                </apex:pageBlockButtons>
        </apex:pageBlock>    
    </apex:form>
</apex:page>

My controller class is as below:

public class ApsTestController{
public Interrogate__c Interrogate{get;set;}
public string x1{get;set;}
public string x2{get;set;}
public string id{get;set;}
public List<SelectOption> x1optionsbelow{get;set;}
public List<SelectOption> x2optionsbelow{get;set;}
public ApsTestcontroller(apexpages.standardcontroller controller)

{


Interrogate = new Interrogate__c();
interrogate = (interrogate__c)controller.getrecord();
x1optionsbelow=new List<SelectOption>();
Schema.DescribeFieldResult statusFieldDescription1=Interrogate__c.X1__c.getDescribe();
        for (Schema.Picklistentry picklistEntry:statusFieldDescription1.getPicklistValues()){
        x1optionsbelow.add(new SelectOption(pickListEntry.getValue(),pickListEntry.getLabel()));
            if (picklistEntry.defaultValue){
            Interrogate.X1__c= pickListEntry.getValue();
            }  
         } 
x2optionsbelow=new List<SelectOption>();
Schema.DescribeFieldResult statusFieldDescription=Interrogate__c.X2__c.getDescribe();
        for (Schema.Picklistentry picklistEntry:statusFieldDescription.getPicklistValues()){
        x2optionsbelow.add(new SelectOption(pickListEntry.getValue(),pickListEntry.getLabel()));
            if (picklistEntry.defaultValue){
            Interrogate.X2__c= pickListEntry.getValue();
            }  
         } 

}
public pagereference save1()

    {
        interrogate__c inte=new interrogate__c();
        inte = [select id, name, name__c, X1__c, X2__c from interrogate__c where id=:Interrogate.id];
        inte.X1__c = Interrogate.X1__c;
        inte.x2__c = Interrogate.x2__c;
        upsert inte;
        pagereference ref;
        ref = new pagereference('/apex/ApsTest?id='+interrogate.id);
        ref.setredirect(true);
        return ref;
    }
}

I want to update the X1 and X2 feilds in interrogate object. But it is not updating.