return a null method

[valoyivd]

this is my method that returns a null but that is not a good thing to return coz my program will fail...what can I do to return a sum thing that will cause my program not to throw a nullpointer exception...here is my code

      private MgCalcStrategy getStrategy() {
        if (isRetirementScheme && isAdminInclusive) {
            return MgCalcStrategy.RET_INCLUSIVE;
        }
        if (isRetirementScheme && !isAdminInclusive) {
            return MgCalcStrategy.RET_EXCLUSIVE;
        }
        if (isBothScheme && isAdminInclusive && isRiskInclusive) {
            return MgCalcStrategy.RISK_INC_ADMIN_INC;
        }
        if (isBothScheme && isAdminInclusive && !isRiskInclusive) {
            return MgCalcStrategy.RISK_INC_ADMIN_INC;
        }
        if (isBothScheme && !isAdminInclusive && isRiskInclusive) {
            return MgCalcStrategy.RISK_INC_ADMIN_EXC;
        }
        if (isBothScheme && !isAdminInclusive && !isRiskInclusive) {
            return MgCalcStrategy.RISK_EXC_ADMIN_EXC;
        }
        if (isRiskScheme) {
            return MgCalcStrategy.RISK_ONLY;
        }
        //TODO: Change this to return a null Strategy
        return null;
    }

[sukatoa]

I guess your code must return an object....

Have a look at object class, take a comparison with null....

if satisfied, then block, else allow...

Correct me if im wrong,
sukatoa

[valoyivd]

public enum MgCalcStrategy {

RET_INCLUSIVE {
public double getCost(MemberGroup mg,Quote quote) {
return mg.getEeContribPerc() + mg.getErContribPerc()/PERCENT_VALUE
* mg.getTotalAnnualSalary();
}
},


RISK_INC_ADMIN_EXC {
public double getCost(MemberGroup mg,Quote quote) {
return (mg.getEeContribPerc() + mg.getErContribPerc()
+ mg.getBenefitFam().getPercCost() + quote.getFinalInput().getAdminPerc()
+ quote.getFinalInput().getRenewalCommPerc())
/PERCENT_VALUE * mg.getTotalAnnualSalary();
}

},
RiskExcAdminInc {
public double getCost(MemberGroup mg,Quote quote) {
return mg.getEeContribPerc()+ mg.getErContribPerc() ;
}

},
RISK_EXC_ADMIN_EXC{
public double getCost(MemberGroup mg,Quote quote) {
return mg.getErContribPerc()+ mg.getEeContribPerc()+
quote.getFinalInput().getAdminPerc()+
quote.getFinalInput().getRenewalCommPerc()+
mg.getBenefitFam().getPercCost()/PERCENT_VALUE
* mg.getTotalAnnualSalary();
}

},
RiskOnly {
public double getCost(MemberGroup mg,Quote quote) {
return mg.getBenefitFam().getPercCost();
}

}, ;
public abstract double getCost(MemberGroup mg,Quote quote);
private static final double PERCENT_VALUE = 100.0;

}

just don't know how am I gona implement the null strategy...here is the completing code of what I have ...please help me