Some Java code optimization records in [essay] work

Record it, it's a little messy.

Both the ContainsKey and get methods of 1.hashmap call hash () so to avoid simultaneous use, you can use the following tool class

    public static <K> int Getmapintvalue (map<k, integer> map, K k) {    return Getmapintvalue (map, K,-1);    } Public        static <K> int Getmapintvalue (map<k, integer> Map, K K, int defaultvalue) {    Integer value = ma P.get (k);    if (value = = null) {    return defaultvalue;    } else {    return value;    }    }

　　

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Some Java code optimization records in [essay] work