CODEWITHSUNDEEP
javaandroid
TariqN
TariqN

Reputation: 746

Static final variable has the old value after rebuilding

This is my Config class:

public class Config
{
  public static final String urlApi = "http://127.0.0.1/api/";
}

Whenever I want to change the location, I have to change the value of this variable:

public class Config
{
  public static final String urlApi = "http://192.168.50.101/api/";
}

In this case, the value is:

"http://192.168.50.101/api/"

But in debugging mode I saw that "urlApi" has the old value, old IP address. Its weird. How do I fix it ?

Upvotes: 0

Views: 1013

Answers (3)

TariqN
TariqN

Reputation: 746

I solved the problem. I go to "Clean project" and then again "Make Project", i think this is explanation.

Note: If a primitive type or a string is defined as a constant and the value is known at compile time, the compiler replaces the constant name everywhere in the code with its value. This is called a compile-time constant. If the value of the constant in the outside world changes (for example, if it is legislated that pi actually should be 3.975), you will need to recompile any classes that use this constant to get the current value.

Upvotes: 2

Plex
Plex

Reputation: 75

Take a look: http://www.tutorialspoint.com/java/java_nonaccess_modifiers.htm

There are the different Access Modifiers

Upvotes: 1

Bobby
Bobby

Reputation: 1454

You must change:

public class Config {
    public static final String urlApi = "http://192.168.50.101/api/";
}

to:

public class Config {
    public static String urlApi = "http://192.168.50.101/api/";
}

The final keyword means that the String is a constant - not a variable. This is, it can't be changed. Removing final will allow the String to be changed whenever you want as normal.

Upvotes: 0

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