import org.apache.commons.configuration2.Configuration; import org.apache.commons.configuration2.builder.FileBasedConfigurationBuilder; import org.apache.commons.configuration2.builder.ReloadingFileBasedConfigurationBuilder; import org.apache.commons.configuration2.builder.ConfigurationBuilderEvent; import org.apache.commons.configuration2.builder.FileBasedConfigurationBuilder; import org.apache.commons.configuration2.builder.FileBasedConfigurationBuilderEvent; import org.apache.commons.configuration2.builder.FileBasedConfigurationBuilderResultCreatedEvent; import org.apache.commons.configuration2.builder.FileBasedBuilderParametersImpl; import org.apache.commons.configuration2.ex.ConfigurationException; import org.apache.commons.configuration2.builder.BasicBuilderResultEventListener; public class ConfigExample { public static void main(String[] args) { try { FileBasedConfigurationBuilder<PropertiesConfiguration> builder = new FileBasedConfigurationBuilder<>(); builder.configure(new FileBasedBuilderParametersImpl().setFileName("config.properties")); Configuration config = builder.getConfiguration(); String value = config.getString("key"); System.out.println("Value: " + value); } catch (ConfigurationException e) { e.printStackTrace(); } } }