题解 | #简单错误记录#

import java.util.Scanner;

import java.util.*;

public class  Main{
    //用array list顺序表去做统计
    // 独立一个方法去取值key错误记录
    //用 map1 去记录 key错误记录在顺序表中的位置
    //用 map2 去判断并记录 key错误记录出现的次数

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String[] keySplit = null;
        String[] nameSplit = null;
        List<String> outList = new ArrayList<>();
        Map<String, Integer> occurTimesMap = new HashMap<>();
        String key = null;
        while (in.hasNextLine()) {
            String input = in.nextLine();
            if (input != null && "" != input) {
                keySplit = input.split("\\\\");
            } else {
                break;
            }
            if (keySplit != null) {
                nameSplit = keySplit[keySplit.length - 1].split(" ");
            }
            //取file name值
            if (nameSplit != null) {
                if (nameSplit[0].length() <= 16) {
                    key = keySplit[keySplit.length - 1];
                } else {
                    key = nameSplit[0].substring(nameSplit[0].length() - 16) + " " + nameSplit[1];
                }
            }
            //如果复现,累计出现次数
            if (occurTimesMap.get(key) != null) {
                occurTimesMap.put(key, occurTimesMap.get(key) + 1);
            } else {
                //统计第一次，并且添加list
                occurTimesMap.put(key, 1);
                outList.add(key);
            }
        }
        //取list最后8条+对应的次数值
        for (int i = outList.size() > 8 ? outList.size() - 8 : 0; i < outList.size();
                i++) {
            System.out.println(outList.get(i) + " " + occurTimesMap.get(outList.get(i)));
        }
    }
}