class Configuration {
// Define a private static property (shared globally across all instances)
private static String environment = "production";
// Public static getter method to access the private static property
public static String getEnvironment() {
return environment;
}
// Public static setter method to modify the static property safely
public static void setEnvironment(String newEnv) {
if (newEnv != null && !newEnv.isBlank()) {
environment = newEnv;
}
}
}
public class Main {
public static void main(String[] args) {
// 1. Access static members directly via the Class Name (Best Practice)
System.out.println("Current Environment: " + Configuration.getEnvironment());
// 2. Modify the static property via a static setter
Configuration.setEnvironment("staging");
System.out.println("Updated Environment: " + Configuration.getEnvironment());
/*
* Note on Public Static Fields:
* If a static field is declared as 'public', you can access it directly as:
*
* class PublicConfig {
* public static String appName = "MyApp";
* }
* System.out.println(PublicConfig.appName);
*
* However, public mutable static fields are generally discouraged because
* they lack encapsulation and can lead to unintended side effects across threads.
*/
}
}
/*
run:
Current Environment: production
Updated Environment: staging
*/
