public static enum Service.Mode extends Enum<Service.Mode>
MESSAGE可访问整个协议消息, PAYLOAD仅协议消息的有效载荷。 
      | Modifier and Type | Method and Description | 
|---|---|
| static Service.Mode | valueOf(String name)
              以指定的名称返回此类型的枚举常量。 
             | 
| static Service.Mode[] | values()
              按照它们声明的顺序返回一个包含此枚举类型常量的数组。 
             | 
public static final Service.Mode MESSAGE
public static final Service.Mode PAYLOAD
public static Service.Mode[] values()
  for (Service.Mode c : Service.Mode.values())
    System.out.println(c);  
          public static Service.Mode valueOf(String name)
name - 要返回的枚举常量的名称。 
           IllegalArgumentException - 如果此枚举类型没有指定名称的常量 
           NullPointerException - 如果参数为空 
            Submit a bug or feature 
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