在Java bean中声明枚举变量 [英] Declare enum variable in Java bean

问题描述

我需要将一个枚举变量声明为一个类成员，并且需要像java bean一样为它定义一个setter和getter。这样的事情 -

I need to declare an enum variable as a class member and need to define a setter and getter for that like a java bean. something like this -

public class Vehicle {
 private String id;
 private String name;
 enum color {
   RED, GREEN, ANY;
 }
 // setter and getters
} 

现在，我想将颜色属性设置为红色，绿色或任何来自其他类的颜色，并希望做出相应的决定。

Now, I want to set color property as red, green or any from some other class and want to make decisions accordingly.

推荐答案

enum必须公开才能被外界看到：

public class Vehicle {
     private String id;
     private String name;

     public enum Color {
       RED, GREEN, ANY;
     };

     private Color color;    

     public Color getColor(){
        return color; 
     }

     public void setColor(Color color){
         this.color = color;
     }   

    } 

然后从外面你可以做的包：

vehicle.setColor(Vehicle.Color.GREEN);

如果你只需要在与车辆相同的包装内使用Vehicle.Color 您可以从 enum 声明中删除 public 。

if you only need to use Vehicle.Color inside the same package as Vehicle you may remove the public from the enum declaration.

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