Question

I have these data from two different files like these:

file 1 :

• 1001, Name One
• 1002, Name Two
• 1003, Name Three
• 1004, Name Four
• 1005, Name Five

file 2:

• 1001, 1234, 450
• 1002, 2345, 560
• 1003, 3456, 730
• 1004, 4567, 200
• 1005, 5678, 1000

as seen from the date above they have reference with each other (1001, 1002, … , 1005)
my question what is the proper way to combine them into a single array and retrieve them via there references.

Answer 1

You could work with a Map

Map<Integer,String>;

then you could store the first file, with all these id´s in an ArrayList.

In the second file you could simply look up the values and write both of them into the Map