Question

I have situation, where I want to read configuration file only one time, when class is instantiated.

Suppose I have a method named readConfig(), that reads configuration and puts it into a Map object. When the program is required to use configuration value it reads object with it’s define key. I want to know that constructor calls only once it’s life cycle. Can I put my method readConfig() into constructor, which would give me benefit of one time calling or is there another mechanism to do that?

Answer 1

Better design would be

public static YourObject getMyObject(File configFile){
    //process and create an object configure it and return it
}

• Factory design pattern