题解 | #简单错误记录#

读懂题目是关键。首先分离错误的行号和文件名，再把文件的后缀名截取下来（最后一个斜杠后的内容）并且超过16个字符的就取最后16个字符。一个错误记录由文件名和行号组成，把这个作为key放入map中即可。最后只需打印不超过8个记录即可。

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        Map<String,Integer> map = new LinkedHashMap<>();
        while (in.hasNext()) { 
            String str = in.nextLine();
            String[] strs = str.split(" ");
            int row = Integer.parseInt(strs[1]);
            String file[] = strs[0].split("\\\\");
            String fileName = file[file.length-1];
            String saveFileName = fileName.length()>16?fileName.substring(fileName.length()-16)+" "+row:fileName+" "+row;
            if(map.get(saveFileName)==null)
                map.put(saveFileName,1);
            else 
                 map.put(saveFileName,map.get(saveFileName)+1);
        }
        String res[] = new String[map.size()];
        int index = 0;
        for(Map.Entry<String,Integer> entry:map.entrySet()){
            if(map.size() - index <= 8)
                System.out.println(entry.getKey()+" "+entry.getValue());
            index++;
        }
    }
}