public String getNameByHashCode(long hashCode) {
        int m = Arrays.binarySearch(hashCodes, hashCode);
        if (m < 0) {
            return null;
        }

        int index = this.mapping[m];
        return names[index];
    }
Create a symbol table

@param input input
@since 2.0.58
core/src/main/java/com/alibaba/fastjson2/SymbolTable.java