CLR中的枚举简称为常量。基础类型必须是整数。在Java中，枚举更像是类型的命名实例。该类型可能非常复杂，并且-如您的示例所示-包含多个不同类型的字段。
要将示例移植到C＃，我只需将枚举更改为不可变的类，并公开该类的静态只读实例：
using System;using System.Collections.Generic;namespace ConsoleApplication1{ class Program { static void Main(string[] args) { Planet planetEarth = Planet.MERCURY; double earthRadius = pEarth.Radius; // Just threw it in to show usage double earthWeight = double.Parse("123"); double earthMass = earthWeight / pEarth.SurfaceGravity(); foreach (Planet p in Planet.Values) Console.WriteLine($"Your weight on {p} is {p.SurfaceWeight(mass)}"); Console.ReadKey(); } } public class Planet { public static readonly Planet MERCURY = new Planet("Mercury", 3.303e+23, 2.4397e6); public static readonly Planet VENUS = new Planet("Venus", 4.869e+24, 6.0518e6); public static readonly Planet EARTH = new Planet("Earth", 5.976e+24, 6.37814e6); public static readonly Planet MARS = new Planet("Mars", 6.421e+23, 3.3972e6); public static readonly Planet JUPITER = new Planet("Jupiter", 1.9e+27, 7.1492e7); public static readonly Planet SATURN = new Planet("Saturn", 5.688e+26, 6.0268e7); public static readonly Planet URANUS = new Planet("Uranus", 8.686e+25, 2.5559e7); public static readonly Planet NEPTUNE = new Planet("Neptune", 1.024e+26, 2.4746e7); public static readonly Planet PLUTO = new Planet("Pluto", 1.27e+22, 1.137e6); public static IEnumerable<Planet> Values { get { yield return MERCURY; yield return VENUS; yield return EARTH; yield return MARS; yield return JUPITER; yield return SATURN; yield return URANUS; yield return NEPTUNE; yield return PLUTO; } } public string Name { get; private set; } public double Mass { get; private set; } public double Radius { get; private set; } Planet(string name, double mass, double radius) => (Name, Mass, Radius) = (name, mass, radius); // Wniversal gravitational constant (m3 kg-1 s-2) public const double G = 6.67300E-11; public double SurfaceGravity() => G * mass / (radius * radius); public double SurfaceWeight(double other) => other * SurfaceGravity(); public override string ToString() => name; }}
