java枚举类的属性、方法和构造方法应用实战

public enum Gender
{
  MALE,FEMALE;
  // 定义一个public修饰的实例变量
  public String name;
}

public class GenderTest
{
  public static void main(String[] args)
  {
   // 通过Enum的valueOf()方法来获取指定枚举类的枚举值
   Gender g = Enum.valueOf(Gender.class , "FEMALE");
   // 直接为枚举值的name实例变量赋值
   g.name = "女";
   // 直接访问枚举值的name实例变量
   System.out.println(g + "代表:" + g.name);
  }
}

public enum Gender
{
  MALE,FEMALE;
  private String name;
  public void setName(String name)
  {
   switch (this)
   {
     case MALE:
      if (name.equals("男"))
      {
        this.name = name;
      }
      else
      {
        System.out.println("参数错误");
        return;
      }
      break;
     case FEMALE:
     if (name.equals("女"))
     {
      this.name = name;
     }
     else
     {
      System.out.println("参数错误");
      return;
     }
     break;
   }
  }
  public String getName()
  {
   return this.name;
  }
}

public class GenderTest
{
  public static void main(String[] args)
  {
   Gender g = Gender.valueOf("FEMALE");
   g.setName("女");
   System.out.println(g + "代表:" + g.getName());
   // 此时设置name值时将会提示参数错误。
   g.setName("男");
   System.out.println(g + "代表:" + g.getName());
  }
}

public enum Gender
{
  // 此处的枚举值必须调用对应构造器来创建
  MALE("男"),FEMALE("女");
  private final String name;
  // 枚举类的构造器只能使用private修饰
  private Gender(String name)
  {
   this.name = name;
  }
  public String getName()
  {
   return this.name;
  }
}

public class GenderTest
{
  public static void main(String[] args)
  {
   Gender g = Gender.valueOf("FEMALE");
   Gender m = Gender.valueOf("MALE");
   System.out.println(g + "代表:" + g.getName());
   System.out.println(m + "代表:" + m.getName());
  }
}