descriptor.html

j2ee api,很好的api。我这现在有

<DT><B>Returns:</B><DD>Object Field value.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javax/management/RuntimeOperationsException.html" title="class in javax.management">RuntimeOperationsException</A></CODE> - for illegal value for field name.</DL>
</DD>
</DL>
<HR>

<A NAME="setField(java.lang.String, java.lang.Object)"><!-- --></A><H3>
setField</H3>
<PRE>
public void <B>setField</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;fieldName,
                     <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;fieldValue)
              throws <A HREF="../../javax/management/RuntimeOperationsException.html" title="class in javax.management">RuntimeOperationsException</A></PRE>
<DL>
<DD>Sets the value for a specific fieldname.	The field value will be validated before
 it is set.  If it is not valid, then an exception will be thrown. This will modify
 an existing field or add a new field.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fieldName</CODE> - The field name to be set. Cannot be null or empty.<DD><CODE>fieldValue</CODE> - The field value to be set for the field
 name.  Can be null.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javax/management/RuntimeOperationsException.html" title="class in javax.management">RuntimeOperationsException</A></CODE> - for illegal value for field name or field value.</DL>
</DD>
</DL>
<HR>

<A NAME="getFields()"><!-- --></A><H3>
getFields</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[] <B>getFields</B>()</PRE>
<DL>
<DD>Returns all of the  fields contained in this descriptor as a string array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>String array of fields in the format <i>fieldName=fieldValue</i>
          If the value of a field is not a String, then the toString() method
          will be called on it and the returned value used as the value for
          the field in the returned array. Object values which are not Strings
          will be enclosed in parens. If the descriptor is empty, you will get
          an empty array.<DT><B>See Also:</B><DD><A HREF="../../javax/management/Descriptor.html#setFields(java.lang.String[], java.lang.Object[])"><CODE>setFields(java.lang.String[], java.lang.Object[])</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getFieldNames()"><!-- --></A><H3>
getFieldNames</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[] <B>getFieldNames</B>()</PRE>
<DL>
<DD>Returns all the fields names in the descriptor.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>String array of fields names. If the descriptor is empty, you will get
          an empty array.</DL>
</DD>
</DL>
<HR>

<A NAME="getFieldValues(java.lang.String[])"><!-- --></A><H3>
getFieldValues</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[] <B>getFieldValues</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;fieldNames)</PRE>
<DL>
<DD>Returns all the field values in the descriptor as an array of Objects. The
 returned values are in the same order as the fieldNames String array parameter.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fieldNames</CODE> - String array of the names of the fields that the values
 should be returned for.  If the array is empty then an empty array will be 
 returned.  If the array is 'null' then all values will be returned.  If a field 
 name in the array does not exist, then null is returned for the matching array
 element being returned.
<DT><B>Returns:</B><DD>Object array of field values. If the descriptor is empty, you will get
          an empty array.</DL>
</DD>
</DL>
<HR>

<A NAME="removeField(java.lang.String)"><!-- --></A><H3>
removeField</H3>
<PRE>
public void <B>removeField</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;fieldName)</PRE>
<DL>
<DD>Removes a field from the descriptor.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fieldName</CODE> - String name of the field to be removed.
 If the field is not found no exception is thrown.</DL>
</DD>
</DL>
<HR>

<A NAME="setFields(java.lang.String[], java.lang.Object[])"><!-- --></A><H3>
setFields</H3>
<PRE>
public void <B>setFields</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;fieldNames,
                      <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>[]&nbsp;fieldValues)
               throws <A HREF="../../javax/management/RuntimeOperationsException.html" title="class in javax.management">RuntimeOperationsException</A></PRE>
<DL>
<DD>Sets all Fields in the list to the new value in with the same index
 in the fieldValue array.  Array sizes must match.  
 The field value will be validated before it is set.  
 If it is not valid, then an exception will be thrown.
 If the arrays are empty, then no change will take effect.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fieldNames</CODE> - String array of field names. The array and array elements cannot be null.<DD><CODE>fieldValues</CODE> - Object array of the corresponding field values.  The array cannot be null.
                      Elements of the array can be null.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javax/management/RuntimeOperationsException.html" title="class in javax.management">RuntimeOperationsException</A></CODE> - for illegal value for field Names or field Values.
              Neither can be null.  The array lengths must be equal. 
              If the descriptor construction fails for any reason, this exception will be thrown.<DT><B>See Also:</B><DD><A HREF="../../javax/management/Descriptor.html#getFields()"><CODE>getFields()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="clone()"><!-- --></A><H3>
clone</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <B>clone</B>()
             throws <A HREF="../../javax/management/RuntimeOperationsException.html" title="class in javax.management">RuntimeOperationsException</A></PRE>
<DL>
<DD>Returns a new Descriptor which is a duplicate of the Descriptor.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javax/management/RuntimeOperationsException.html" title="class in javax.management">RuntimeOperationsException</A></CODE> - for illegal value for field Names or field Values.
              If the descriptor construction fails for any reason, this exception will be thrown.</DL>
</DD>
</DL>
<HR>

<A NAME="isValid()"><!-- --></A><H3>
isValid</H3>
<PRE>
public boolean <B>isValid</B>()
                throws <A HREF="../../javax/management/RuntimeOperationsException.html" title="class in javax.management">RuntimeOperationsException</A></PRE>
<DL>
<DD>Returns true if all of the fields have legal values given their
 names.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true if the values are legal.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javax/management/RuntimeOperationsException.html" title="class in javax.management">RuntimeOperationsException</A></CODE> - If the validity checking fails for any reason, this exception will be thrown.</DL>
</DD>
</DL>
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