While using @Management annotation in the MBean class an error called " Cannot find value method" is fired. my code is given below. the error is fired at place mentioned in BOLD.

package trail.jmx;

import org.jboss.annotation.ejb.Service;
import org.jboss.annotation.ejb.Management;

import javax.ejb.Stateful;


@Service (objectName="trail:service=calculator")
@Management(Calculator.class)
public class CalculatorMBean implements Calculator {

double growthrate;

public void setGrowthrate (double growthrate) {
this.growthrate = growthrate;
}

public double getGrowthrate () {
return growthrate;
}

public double calculate (int start, int end, double saving) {
double tmp = Math.pow(1. + growthrate / 12., 12. * (end - start) + 1);
return saving * 12. * (tmp - 1) / growthrate;
}

// Lifecycle methods
public void create() throws Exception {
growthrate = 0.08;
System.out.println("Calculator - Creating");
}

public void destroy() {
System.out.println("Calculator - Destroying");
}

}


package trail.jmx;

import org.jboss.annotation.ejb.Management;


@Management
public interface Calculator {

public void setGrowthrate (double g);
public double getGrowthrate ();

// The management method
public double calculate (int start, int end, double saving);

// Life cycle method
public void create () throws Exception;
public void destroy () throws Exception;
}