java - What would be an appropriate data-structure to store a 2D table structure in memory? -

i have 2d table structure reading underlying database, , wondering, best in-memory data-structure use store into. where, can accessible further reading, manipulation, etc.

i maps of maps like

map<string, map<string,string>> table = new hashmap<string, map<string,string>>(); 

here example

column_a(primary),  column_b,  column_c -------------------------------- abc              |  xyz      | 123 def              |  xxx      | 456 

so after read table use this:

map.get("abc").get("column_b").equals("xyz") map.get("def").get("column_c").equals("456") 

hope helps. note: chose first map have key of string because table may not have integers ids. can change them if think integer fit better.