Java - add method conflicting with exception -


ive been sitting 2 hours , can't find solution. can't add more 1 friend arraylist, because if phone null casts exception getfriend() method instead of adding list. simple way work around this?

/**  *  ensures can add friend if friend same phone number doesn't exist  *  @param f friend  *  @return boolean  */  public boolean addfriend(friend f){      if(getfriend(f.getphone()) == null) {        friends.add(f);        return true;    }    else {        system.out.println("-------------------------------------");        system.out.println("member phone exists");        system.out.println("-------------------------------------");        return false;    }   }   /**  *  searches arraylist friend matching phone  *    *  @param phone string  *  @return friend if matching phone, else returns null  */ public friend getfriend(string phone) {     friend res = null;     if(friends.size() != 0){         for(friend f : friends) {             if(f.getphone().equals(phone)){                 res = f;             }         }         if(res == null){           throw new nullpointerexception("no result found");         }    }     return res;        }

change

if(res == null){       throw new nullpointerexception("no result found"); }

to return null.

as checking null safe.

public friend getfriend(string phone) { if(friends.size() != 0){     for(friend f : friends) {         if(f.getphone().equals(phone)){             return f;         }     } } return null;        }

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