CODEWITHSUNDEEP
javaoop
Stefan Strooves
Stefan Strooves

Reputation: 634

Return two strings as method signature

I have the following method and I need to return two strings:

  1. value of type.getName()
  2. value of field.getName()

What is the best way to do it?

public static void getClassMetaData(List<Object> listClsObj) {
    ....

    for (Field field : declaredFields) {
         Class<?> type = field.getType();

         System.out.println(type.getName());
         System.out.println(field.getName());
      }
}

Upvotes: 0

Views: 176

Answers (6)

Anugoonj
Anugoonj

Reputation: 575

You should try and return a list as you are eventually using the attributes of field object in your other code.

Plus it would make the method more maintainable. The consumer of the method could decide what data it needs from the Field object.

Upvotes: 1

Rohit Jain
Rohit Jain

Reputation: 213311

I would rather return just the Field, since you can get the type and other information from the field itself.

And then at the point of invocation, call the method - field.getType() to get the type.

Seems like you are working with all the declared fields of your class, in which case you can just return the List<Field>: -

public static List<Field> getClassMetaData(List<Object> listClsObj) {

    // Rather than iterating over `declaredField`, just return it
    return declaredFields;
}

Upvotes: 4

Patouche
Patouche

Reputation: 149

You can just return the Field instance instead of try to return 2 String. Otherwise, you can return a object containing your 2 String like a Pair object or a custom object.

class Pair<F, S> {

    private final F first;
    private final S second;

    public Pair(F first, S second) {
        this.first = first;
        this.second = second;
    }
    // getter for first and second
}

Upvotes: 1

Evgeniy Fitsner
Evgeniy Fitsner

Reputation: 946

The more flexible and correct approach to return any number of elements - return List implementation of your data collection.

Upvotes: 2

MoveFast
MoveFast

Reputation: 3025

You can return an array of size 2 with both the fields. 

return new String[]{type.getName(),field.getName()};

Upvotes: 1

Evgeniy Dorofeev
Evgeniy Dorofeev

Reputation: 136062

You can return a String array of course, but I think it would be better to simply return Field

Upvotes: 2

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