CODEWITHSUNDEEP
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danny
danny

Reputation: 113

how can I get enum value by name string

I want to get the enum value by name string,

this the enum code: package practice;

enum Mobile {
  Samsung(400),
  Nokia(250),
  Motorola(325);

  int price;
  Mobile(int p) {
    price = p;
  }
  int showPrice() {
    return price;
  }
}

I can get the class name and the name string

Class enumClass = Class.forName("practice.Mobile");
String name = "Samsung";

how can I get the Samsung value 400 only use enumClass and name? thanks a lot

Upvotes: 1

Views: 3398

Answers (2)

ΦXocę 웃 Пepeúpa ツ
ΦXocę 웃 Пepeúpa ツ

Reputation: 48307

as you may know, there is a valueOf method in every enum, which returns the constant just by resolving the name(read about exceptions when the string is invalid.)

now, since your enum has another fields associated to the constants you need to search its value by matching those fields too...

this is a possible solution using

java 8

public enum ProgramOfStudy {
    ComputerScience("CS"), 
    AutomotiveComputerScience("ACS"), 
    BusinessInformatics("BI");

    public final String shortCut;

    ProgramOfStudy(String shortCut) {
        this.shortCut = shortCut;
    }

    public static ProgramOfStudy getByShortCut(String shortCut) {

        return Arrays.stream(ProgramOfStudy.values()).filter(v -> v.shortCut.equals(shortCut)).findAny().orElse(null);
    }
}

so you can "resolve" the enum by searching its "shortcut"

like

System.out.println(ProgramOfStudy.getByShortCut("CS"));

Upvotes: 2

Gabe
Gabe

Reputation: 441

You can use something like:

final Mobile mobile = Mobile.valueOf("Samsung");
final int price = mobile.showPrice();

(you do have to change the scope of the method showPrice() to public).

Upvotes: 5

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