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Error while validating the input

 
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I have a model Person class which holds users input data



RegisterAction class which acts as an Action is



A form page register.jsp which asks for user input



struts.xml is configured as




If I feel out all the user input form fields, everything works fine but if I keep forms "Enter age" field blank, the framework throws exception
WARNING: Error setting expression 'beanPerson.age' with value '[Ljava.lang.String;@b6434f'
ognl.MethodFailedException: Method "setAge" failed for object Register.Model.Person@2ec5b6 [java.lang.NoSuchMethodException: Register.Model.Person.setAge([Ljava.lang.String;)]
Caused by: java.lang.NoSuchMethodException: Register.Model.Person.setAge([Ljava.lang.String;)
at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1206)

I am not able to figure it out, what is going wrong in this.
 
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What happens when "age" is an Integer (not int) field?
 
MaheshS Kumbhar
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Changing the type of age attribute from int to Integer and leaving the form field for age as blank now throws java.lang.NullPointerException in validate method
 
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