Document.java

// src/hassen/automation/configurator/Document.java

package hassen.automation.server;

public class Document implements IDeviceManager, IEventProcessor {

// ...
	private Mapping getMapping (int id) {
		for (Mapping m : getMappings()) {
			if (m.getId() == id) return m;
		}
		return null;
	}
// ...
}

Main.java

package hassen.automation.configurator;

public class Main {

// ...
	private int getInteger (int max) {
		int number = -1;
		while (number == -1) {
			System.out.print("Chose # : ");
			try {
				String text = input.readLine();
				number = Integer.parseInt(text);
				if (number >= max) number = -1;
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return number;
	}

// ...

}