java enum的用法

public enum Type {
   IN("输入参数"),
   OUT("输出参数"),
   VAR("变量");

//定义有参数的构造方法,这样就可以这样写了：IN("....")
   private String des;
   Type(String des)
   {
    this.des=des;
   }
   public String getDesc()
   {
    return des;
   }
}

public enum State {
        ON{

   @Override
   String getInfo() {
     return "开";
   }
        }, OFF {

   @Override
   String getInfo() {
    // TODO Auto-generated method stub
    return null;
   }

        };
        //让每个值扩展一个抽象方法
        abstract String getInfo();
    };

enum的java原型：
public final class Type extends Enum
{

public static final Type IN;
public static final Type OUT;
public static final Type VAR;
private String des;
private static final Type ENUM$VALUES[];

private Type(String s, int i, String des)
{
  super(s, i);
  this.des = des;
}

public String getDesc()
{
  return des;
}

public static Type[] values()
{
  Type atype[];
  int i;
  Type atype1[];
  System.arraycopy(atype = ENUM$VALUES, 0, atype1 = new Type[i = atype.length], 0, i);
  return atype1;
}

public static Type valueOf(String s)
{
  return (Type)Enum.valueOf(com/sunline/flow/ide/project/navigator/model/Type, s);
}

static
{
  IN = new Type("IN", 0, "输入参数");
  OUT = new Type("OUT", 1, "输出参数");
  VAR = new Type("VAR", 2, "变量");
  ENUM$VALUES = (new Type[] {
   IN, OUT, VAR
  });
}
}

作者“lizhensan”

补充：软件开发 , Java ,