LeetCode-937 Reorder Data in Log Files Solution (with Java)

1. Description:

Notes:

2. Examples:

3.Solutions:

/**
 * Created by sheepcore on 2018-11-11
 */
class Solution {
    public String[] reorderLogFiles(String[] logs) {
        Comparator<String> myComp = new Comparator<String>() {
            @Override
            public int compare(String s1, String s2) {
                int s1si = s1.indexOf(' ');
                int s2si = s2.indexOf(' ');
                char s1fc = s1.charAt(s1si+1);
                char s2fc = s2.charAt(s2si+1);
                
                if (s1fc <= '9') {
                    if (s2fc <= '9') return 0;
                    else return 1;
                }
                if (s2fc <= '9') return -1;
                
                int preCompute = s1.substring(s1si+1).compareTo(s2.substring(s2si+1));
                if (preCompute == 0) return s1.substring(0,s1si).compareTo(s2.substring(0,s2si));
                return preCompute;
            }
        };   
        Arrays.sort(logs, myComp);
        return logs;       
    }
}