java.util.MissingResourceException: Can't find bundle for base name.

Answer 1

You need to have your locale name in your properties file name.

Rename your properties file to Messages_es.properties

Since you haven't declared any package, both your compiled class file and the properties file can be in the same root directory.

EDIT in response to comments:

Lets say you have this project structure:

test\src\foo\Main.java (foo is the package name)

test\bin\foo\Main.class

test\bin\resources\Messages_es.properties (properties file is in the folder 'resources' in your classpath)

You can run this with:

c:\test>java -classpath .\bin foo.Main

Updated source code:

package foo;
import java.util.Locale; 
import java.util.ResourceBundle;
import javax.swing.JFrame;

public class Main {

  public static void main(String[] args) {

  Locale currentLocale;
  ResourceBundle messages;

  currentLocale = new Locale("es");

  messages = ResourceBundle.getBundle("resources.Messages", currentLocale);
  System.out.println(messages.getString("Messagesgreetings"));
  System.out.println(messages.getString("Messagesinquiry"));
  System.out.println(messages.getString("Messagesfarewell"));
}
}

Here as you see, we are loading the properties file with the name "resources.Messages"

Hope this helps.