How to map an array values to another array values

Question

I am facing difficulties in mapping the values of two arrays to each other. I am having a string array list which is storing the users selected values:

private List<String> selectedCertificates = new ArrayList<String>();

The above array will store as an example ["SS", "CC", "SC"] and at the same time the user can select a language for certain types but not all of them. For example the type "SS" and the type "CC" should be by default "English" where "SC" can be either English or French or any other language.

        String[] DocType = new String[4];
        String[] DocLanguage = new String[4];

        DocType[0] = "CE";
        DocLanguage[0] = "EN";
        DocType[1] = "SC";
        DoctLanguage[1] = "EN";
        DocType[2] = "SS";
        DocLanguage[2] = ssLanguage;
        DocType[3] = "RR";
        DocLanguage[3] = "FR";

So now my issue is that I want to have a string array for the selected languages only that it will include ["EN","EN",valueofssLanguage] for the same sequence of the selected certificates ["SS", "CC", "SC"], so how can I achieve this?

Thanks

Hashmap, Hashtable can map from string to string.

huseyin tugrul buyukisik
– huseyin tugrul buyukisik

2015-03-29 17:37:52 +00:00
Commented Mar 29, 2015 at 17:37 — huseyin tugrul buyukisik
– huseyin tugrul buyukisik, Commented Mar 29, 2015 at 17:37
Map should fit your needs

jhamon
– jhamon

2015-03-29 17:38:27 +00:00
Commented Mar 29, 2015 at 17:38 — jhamon
– jhamon, Commented Mar 29, 2015 at 17:38
So what should I do I need some guidance.

Learner30
– Learner30

2015-03-29 17:38:58 +00:00
Commented Mar 29, 2015 at 17:38 — Learner30
– Learner30, Commented Mar 29, 2015 at 17:38

M A · Accepted Answer · 2015-03-29 17:42:53Z

1

Use a java.util.Map:

Map<String, String> map = new HasMap<>();
map.put(docType[0], "EN");
...

You can use Map#values() to get a collection view of the values, that is a collections of languages.

edited Mar 29, 2015 at 17:42

answered Mar 29, 2015 at 17:38

M A

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5 Comments

Learner30 Over a year ago

Should I replace the my code with the above suggested? And how do I get the selectedLanguages in a separate string array?

Learner30 Over a year ago

Thanks for the help, but will the map will get the values of the languages once the certificates are selected?

M A Over a year ago

@Learner30 You can retrieve the language corresponding to a specific certificate using Map.get(certificate). See the Javadoc for info about map operations.

M A Over a year ago

Yes it seems Map is the best choice here.

Learner30 Over a year ago

manouti, correct me if I am wrong. First I will do the mapping as how you specified above in your answer. Then, I would use map.get(selectedCertificates) to get the selected mappings, am I correct? Should I keep it in a for loop? Also, should I delete DocType[0] = "CE"; from my code?

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