public static void update(String ID,String name, String sex, String phone, String email, String address){
        String sqlDelete;
        name="'"+name+"'";
        sex="'"+sex+"'";
        phone="'"+phone+"'";
        email="'"+email+"'";
        address="'"+address+"'";
        sql="INSERT INTO AddrBook (ID,name,sex,phone,email,address) VALUES " + "(" +

                ID+","+name + ","+ sex+ ","+phone+ ","+email+ ","+address
                +")";
        sqlDelete="DELETE FROM AddrBook WHERE  ID= "+ID;

        DB.sql(sqlDelete);
        DB.sql(sql);
}