在Java中将地图存储到哪个内存最有效？

Question

I have to store key value pairs in java which is more memory efficient and which is more time efficient while reading and writing directly in file?

1. Table in guava <string,double,double>
2. map in guava <string,object> where object contain two double values.
3. Hashmap in java <string,object> where object contain two double values.

also you can suggest some other methods.

Answer 1

效率最高的可能是Map<String, double[]>不管您是否使用番石榴，我都不会想象会有什么不同。