Read a CSV file and create a HashMap

Question

I have a requirement in which I am iterating a list using a for loop and getting the values of a device like model number(3-digit number),directory number etc. The model number which I got should be compared/search with a CSV file(it has 2 columns-compared with one column-3-digit model number) and need to find its corresponding value in the other column.Once it finds the value it should display that value in the list instead of the 3-digit number.I think I create a hashmap after reading the csv file and pull the output from the hashmap.

Can you let me know if my approach is correct and if so can I get a sample code as how I need to do this? thank you so much in advance. Language-Java

if you are asking for a solution, I don't think anyone is here to do your assignment. — JuliandotNut
– JuliandotNut, Commented Jul 25, 2014 at 21:49
Does this answer your question? Convert CSV values to a HashMap key value pairs in JAVA — S S
– S S, Commented Apr 5, 2022 at 5:50

Doswell · Accepted Answer · 2014-07-25 21:52:53Z

2

Yes if you have one CSV file has a mapping of the model number to something you can load that into a HashMap with the key being the model number and the value whatever it is you want to show instead.

To initialize a HashMap;

HashMap<String, String> hashMap = new HashMap<String, String>();

To add to it when you read your first CSV file;

hashMap.put(key, value);

And to retrieve the value based on the key when handling the other CSV file.

String value = hashMap.get(key);

For more info on HashMap; http://docs.oracle.com/javase/7/docs/api/java/util/HashMap.html

answered Jul 25, 2014 at 21:52

Doswell

4183 silver badges11 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

javalearner Over a year ago

Thank you so much for your answer.I am a beginner and still learning.Your pointers really helps.Thanks again.

Collectives™ on Stack Overflow

Read a CSV file and create a HashMap

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related