Can you give an example of a situation where you applied the Singleton pattern in your practice?

The Singleton pattern is used when you need to ensure that a class has only one instance, such as for managing application configuration or database connections. In one project, we had a class ConfigManager that loaded settings from a file and needed to be accessible everywhere as a single object to avoid data desynchronization and redundant loading.

Example implementation of Singleton in Java:

public class ConfigManager {
    private static ConfigManager instance;
    private Properties properties;

    private ConfigManager() {
        properties = new Properties();
        // load settings
    }

    public static synchronized ConfigManager getInstance() {
        if (instance == null) {
            instance = new ConfigManager();
        }
        return instance;
    }

    public String getProperty(String key) {
        return properties.getProperty(key);
    }
}