题解 | #简单错误记录#

hashmap存入，并只取后八个

import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        LinkedHashMap<String, Integer> map = new LinkedHashMap<>();
        while (sc.hasNext()) {
            String msg = sc.next();
            int err = sc.nextInt();
            String[] temp = msg.split("\\\\");
            String errMsg = temp[temp.length-1];
            if (errMsg.length()>16) {
                errMsg = errMsg.substring(errMsg.length()-16);
            }
            String key = errMsg+" "+err;
            int count = 1;
            if (map.containsKey(key)) {
                map.put(key,map.get(key)+1);
            } else {
                map.put(key,count);
            }
        }
        int count = 0;
        for (String s:map.keySet()) {
            count++;
            if (count>(map.keySet().size()-8)) {
                System.out.println(s+" "+map.get(s));
            }
        }
 

    }
}