List初始化錯誤導致的空指針異常

    public Page<SqlPojo> TransTkvSqlToSqlPojo (List<TkvSql> list1){
        List<SqlPojo> list = new LinkedList<SqlPojo>();
        Iterator iterator = list1.iterator();
        while (iterator.hasNext()) {

            TkvSql tkvSql = (TkvSql) iterator.next();
            String insertPojo = new String(tkvSql.getInsertSql());
            String deletePojo = new String(tkvSql.getDeleteSql());
            String updatePojo = new String(tkvSql.getUpdateSql());
            String queryPojo = new String(tkvSql.getQuerySql());
            String duplicatePojo = new String(tkvSql.getDuplicateSql());
            String createPojo = new String(tkvSql.getCreateSql());

            SqlPojo sqlPojo = new SqlPojo();
            sqlPojo.setId(tkvSql.getId());
            sqlPojo.setBizId(tkvSql.getBizId());
            sqlPojo.setCtime(tkvSql.getCtime());
            sqlPojo.setUptime(tkvSql.getUptime());
            sqlPojo.setCuser(tkvSql.getCuser());
            sqlPojo.setUpuser(tkvSql.getUpuser());
            sqlPojo.setStatus(tkvSql.getStatus());
            sqlPojo.setInsertSql(insertPojo);
            sqlPojo.setDeleteSql(deletePojo);
            sqlPojo.setUpdateSql(updatePojo);
            sqlPojo.setQuerySql(queryPojo);
            sqlPojo.setDuplicateSql(duplicatePojo);
            sqlPojo.setCreateSql(createPojo);
            list.add(sqlPojo);
        }
        return (Page<SqlPojo>)list;
    }

    List<SqlPojo> list = new LinkedList<SqlPojo>();
    這是正確寫法

     List<SqlPojo> list = null;
     這是錯誤寫法！