Relation null??

From: Emre Yilmaz (emre.yilma..tr.com.tr)
Date: Wed Jun 29 2005 - 10:46:47 EDT

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Hello,

I want to set a table relation to null but I couldn't do this i get an
Exception of nullpointer. How can I set a table relation null or like null.
My code is here;

       Visitor visitor = getPersonel(identNo);
        Visitor visitor2 = getPersonelByCardNo(cardNo);
        if(visitor2==visitor){
            visitor2.setCardRel(null);
        }else if(visitor2!=null){
            visitor2.setCardRel(null);
        }else if(visitor!=null){
            visitor.setCardRel(null);
        }

java.lang.NullPointerException

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