public static enum MessageContext.Scope extends Enum<MessageContext.Scope>
APPLICATION对处理程序,客户端应用程序和服务端点可见; 
       属性范围为HANDLER ,处理程序通常只能看到。 
      | Enum Constant and Description | 
|---|
| APPLICATION | 
| HANDLER | 
| Modifier and Type | Method and Description | 
|---|---|
| static MessageContext.Scope | valueOf(String name)
              以指定的名称返回此类型的枚举常量。 
             | 
| static MessageContext.Scope[] | 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 MessageContext.Scope APPLICATION
public static final MessageContext.Scope HANDLER
public static MessageContext.Scope[] values()
  for (MessageContext.Scope c : MessageContext.Scope.values())
    System.out.println(c);  
          public static MessageContext.Scope 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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