我在使用hadoop v2的这个减速机上的输出遇到了一些问题
出于某种原因，如果我尝试将string.valueof（pagerank）连接到字符串上，则更新的值不会写入输出。而是为每个值写入值0.15。有人能帮我吗？如果需要的话，我会提供更多的信息。谢谢！

static class LoopingPRReducer extends Reducer<Text, Text, Text, Text> {
    // The main reduce() function; the input key/value classes must match the first two above, and the key/value classes in your emit() statement must match the latter two above.
    // Make sure that the output key/value classes also match those set in your job's configuration (see below).
    @Override
    protected void reduce(Text key, Iterable<Text> values, Context context) throws IOException, InterruptedException {
        String outlinks = null;
        double sum = 0.0;
        for (Text value: values) {
            String rank = value.toString();
            if (rank.contains("[")) {
                outlinks = rank;
                continue;
            }
            sum += Double.parseDouble(rank);
        }
        double pageRank = (sum)*0.85+0.15;
        String newRank = "[" + String.valueOf(pageRank)+"]"; //formatted output doesn't work
        context.write(key, new Text(newRank));}