package singleton;

public enum AppConfigEnum {

    INSTANCE; // The JVM creates this exactly once, period.

    // Enum instances can have fields and methods like any class
    private final String configPath;

    AppConfigEnum() {
        // Enum constructors run once, when the constant is first used
        this.configPath = System.getProperty("config.path", "application.properties");
        System.out.println("Loading config from: " + configPath);
    }

    public String getProperty(String key) {
        return System.getProperty(key, "(not set)");
    }
}