问如何分解我正在使用的Restlet的哪个版本？

EN

import org.restlet.engine.Engine;
(...)
System.out.println("version = "+Engine.VERSION);

public class Engine {
    (...)

    /** Major version number. */
    public static final String MAJOR_NUMBER = "2";

    /** Minor version number. */
    public static final String MINOR_NUMBER = "3";

    /** Release number. */
    public static final String RELEASE_NUMBER = ".1";

    (...)
}