CODEWITHSUNDEEP
javaobject
TripVoltage
TripVoltage

Reputation: 341

Using a String as an identifier when creating a new Object

I have a String eg:

1,TSM,501,SM0156,John Thorne,BCO200,24,30,2,CSM,500,AC1157,Peter Jones,BCO104,24,60,...

The string represents a list of people within a department. The "SM0156" & "AC1157" are their unique identifiers within the department

I would like to loop through the string and create a new 'person object' every time I meet an identifier. The object is then stored in an ArrayList. I believe I could do this with the following code:

deptList.add(new = PersonDetails());

This creates my object but I want to be able to reference it later possibly by the unique identifier! Whilst looping through the original string i have extracted out the identifier in this case "SM0156". I was hoping there was a way to then use this as the reference to the object EG

PersonDetails "SM0156" = new PersonDetails();
deptList.add("SM0156");

Obviously here "SM0156" represents a string but surely I could convert it somehow to use as an reference to my new PersonObject??

Thanks for any help in advance..

Upvotes: 0

Views: 166

Answers (3)

n.st
n.st

Reputation: 946

You can use a Map<String, PersonDetails>.

Upvotes: 0

sakir
sakir

Reputation: 21

Try to use HashMaps. HashMaps stores the objects with key/value principal.

http://www.mkyong.com/java/how-to-use-hashmap-tutorial-java/

Upvotes: 0

Jeroen Vannevel
Jeroen Vannevel

Reputation: 44449

You do not want to attempt this. Store your details in a collection and depending on the collection you should use it accordingly.

If you choose an ArrayList, make sure your PersonDetails class has a field Id which you can look up (or create a new class that holds an Id and a PersonDetails object).

Another solution is creating a Map<String, PersonDetails> to map the Id to the person.

Upvotes: 1

Related Questions