Java: instantiating an enum using reflection

Question

Suppose you have a text file like:

my_setting = ON
some_method = METHOD_A
verbosity = DEBUG
...

That you wish to to update a corresponding

Answer 1

You may code your Enum similar tho this:

public enum Setting {

    ON("ON"),OFF("OFF");

    private final String setting;

    private static final Map stringToEnum = new ConcurrentHashMap();
    static {
        for (Setting set: values()){
            stringToEnum.put(set.setting, set);
        }
    }

    private Setting(String setting) {
        this.setting = setting;
    }

    public String toString(){
        return this.setting;
    }

    public static RequestStatus fromString(String setting){
        return stringToEnum.get(setting);
    }   
}

Then you may easily create Enum from String without reflection:

Setting my_settings = Setting.fromString("ON");

This solution is not originated from myself. I read it from somewhere else, but I can't recall the source.