CODEWITHSUNDEEP
scala
user582040
user582040

Reputation: 99

Declare a global variable in scala

Is it possible to declare a global variable in this way?

if i run this snippet, i will encounter an error

object Test {
  val value -> error on this line for declaration issue
  def run() {
    value  = ... 
  }
def main(args: Array[String]) {
    run()
  }

thanks in advance.

Upvotes: 5

Views: 42033

Answers (3)

Tolga Celik
Tolga Celik

Reputation: 1

you can add java classes in Scala , so you can create a class and put your variables in static { } method and you can get access using private get methods .

package com.test.config

import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;

public class ConfigurationManager {

    private static String myLink;
 
    public static String GetMyLink()
    {
        return myLink;
    }

    static {
        Config config = ConfigFactory.load();
        myLink = config.getString("com.test.myLink");
    }
}

Upvotes: 0

mfirry
mfirry

Reputation: 3692

You could in theory do it using a Trait. I'm not sure this is what you need though.

It would look like this:

trait MyTestTrait {
  val value: String
}

object MyTest extends MyTestTrait {
  val value = "yo!"
  def run = println(value)
}

Upvotes: 8

Madoc
Madoc

Reputation: 5919

No, that's not possible. You should do this:

object Test {
  val value = ...
}

Since your run() function does not take parameters, the contents of value can also be computed without it.

Upvotes: 3

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