HashMap找最大值对应的哪一个键java

public static String getProcessCdByName(HashMap<String, Integer> processMap){//我找最大值对应的哪一个键
  int max=0;
  for (Integer in : processMap.values()) {
    System.err.println(in);
    max=Math.max(max, in);
  }
  String result = null;
  Set<Map.Entry<String, Integer>> set = processMap.entrySet();
  for(Map.Entry<String, Integer> entry : set){
    if(entry.getValue()==max){
    result = entry.getKey();
    break;
    }
  }
  return result;
  }

File file = new File("/root/info.txt"); 
            BufferedReader br = new BufferedReader(new FileReader(file));
            String s;
            String[] column = new String[2];
            column[0] = "level";
            column[1] = "class";
            int i = 0;
            while ((s = br.readLine()) != null) {
              String line[] = s.split(" ");             try {
                你的操作============
              } catch (Exception e) {
            e.printStackTrace();
          }
            }