field.html

API資料大全

public int <B>getInt</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;obj)
           throws <A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A>,
                  <A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></PRE>
<DL>
<DD>Gets the value of a field as an <code>int</code> on the specified object.
 This method is equivalent to
 <code>((Number)get(obj)).intValue()</code>,
 except that an <code>IllegalArgumentException</code> is thrown 
 if the field value cannot be converted to the type
 <code>int</code> by a widening conversion.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></CODE> - if the underlying constructor
              is inaccessible.<DD><CODE><A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - if the specified object is not 
              an instance of the class or interface declaring the
              underlying field (or a subclass or implementor 
              thereof), or if the field value cannot be
              converted to the type <code>int</code> by a 
              widening conversion.<DD><CODE><A HREF="../../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the specified object is null
              and the field is an instance field.<DD><CODE><A HREF="../../../java/lang/ExceptionInInitializerError.html">ExceptionInInitializerError</A></CODE> - if the initialization provoked
              by this method fails.<DT><B>See Also: </B><DD><A HREF="../../../java/lang/reflect/Field.html#get(java.lang.Object)"><CODE>get(java.lang.Object)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getLong(java.lang.Object)"><!-- --></A><H3>
getLong</H3>
<PRE>
public long <B>getLong</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;obj)
             throws <A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A>,
                    <A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></PRE>
<DL>
<DD>Gets the value of a field as a <code>long</code> on the specified object.
 This method is equivalent to
 <code>((Number)get(obj)).longValue()</code>,
 except that an <code>IllegalArgumentException</code> is thrown 
 if the field value cannot be converted to the type
 <code>long</code> by a widening conversion.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></CODE> - if the underlying constructor
              is inaccessible.<DD><CODE><A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - if the specified object is not 
              an instance of the class or interface declaring the
              underlying field (or a subclass or implementor 
              thereof), or if the field value cannot be
              converted to the type <code>long</code> by a 
              widening conversion.<DD><CODE><A HREF="../../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the specified object is null
              and the field is an instance field.<DD><CODE><A HREF="../../../java/lang/ExceptionInInitializerError.html">ExceptionInInitializerError</A></CODE> - if the initialization provoked
              by this method fails.<DT><B>See Also: </B><DD><A HREF="../../../java/lang/reflect/Field.html#get(java.lang.Object)"><CODE>get(java.lang.Object)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getFloat(java.lang.Object)"><!-- --></A><H3>
getFloat</H3>
<PRE>
public float <B>getFloat</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;obj)
               throws <A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A>,
                      <A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></PRE>
<DL>
<DD>Gets the value of a field as a <code>float</code> on the specified object.
 This method is equivalent to
 <code>((Number)get(obj)).floatValue()</code>,
 except that an <code>IllegalArgumentException</code> is thrown 
 if the field value cannot be converted to the type
 <code>float</code> by a widening conversion.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></CODE> - if the underlying constructor
              is inaccessible.<DD><CODE><A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - if the specified object is not 
              an instance of the class or interface declaring the
              underlying field (or a subclass or implementor 
              thereof), or if the field value cannot be
              converted to the type <code>float</code> by a 
              widening conversion.<DD><CODE><A HREF="../../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the specified object is null
              and the field is an instance field.<DD><CODE><A HREF="../../../java/lang/ExceptionInInitializerError.html">ExceptionInInitializerError</A></CODE> - if the initialization provoked
              by this method fails.<DT><B>See Also: </B><DD><A HREF="../../../java/lang/reflect/Field.html#get(java.lang.Object)"><CODE>get(java.lang.Object)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getDouble(java.lang.Object)"><!-- --></A><H3>
getDouble</H3>
<PRE>
public double <B>getDouble</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;obj)
                 throws <A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A>,
                        <A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></PRE>
<DL>
<DD>Gets the value of a field as a <code>double</code> on the specified object.
 This method is equivalent to
 <code>((Number)get(obj)).doubleValue()</code>,
 except that an <code>IllegalArgumentException</code> is thrown 
 if the field value cannot be converted to the type
 <code>double</code> by a widening conversion.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></CODE> - if the underlying constructor
              is inaccessible.<DD><CODE><A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - if the specified object is not 
              an instance of the class or interface declaring the
              underlying field (or a subclass or implementor 
              thereof), or if the field value cannot be
              converted to the type <code>double</code> by a 
              widening conversion.<DD><CODE><A HREF="../../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the specified object is null
              and the field is an instance field.<DD><CODE><A HREF="../../../java/lang/ExceptionInInitializerError.html">ExceptionInInitializerError</A></CODE> - if the initialization provoked
              by this method fails.<DT><B>See Also: </B><DD><A HREF="../../../java/lang/reflect/Field.html#get(java.lang.Object)"><CODE>get(java.lang.Object)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="set(java.lang.Object, java.lang.Object)"><!-- --></A><H3>
set</H3>
<PRE>
public void <B>set</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;obj,
                <A HREF="../../../java/lang/Object.html">Object</A>&nbsp;value)
         throws <A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A>,
                <A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></PRE>
<DL>
<DD>Sets the field represented by this <code>Field</code> object on the
 specified object argument to the specified new value. The new
 value is automatically unwrapped if the underlying field has a
 primitive type.

 <p>The operation proceeds as follows:

 <p>If the underlying field is static, the <code>obj</code> argument is
 ignored; it may be null.

 <p>Otherwise the underlying field is an instance field.  If the
 specified object argument is null, the method throws a
 <code>NullPointerException</code>.  If the specified object argument is not
 an instance of the class or interface declaring the underlying
 field, the method throws an <code>IllegalArgumentException</code>.

 <p>If this <code>Field</code> object enforces Java language access control, and
 the underlying field is inaccessible, the method throws an
 <code>IllegalAccessException</code>.

 <p>If the underlying field is final, the method throws an
 <code>IllegalAccessException</code>.

 <p>If the underlying field is of a primitive type, an unwrapping
 conversion is attempted to convert the new value to a value of
 a primitive type.  If this attempt fails, the method throws an
 <code>IllegalArgumentException</code>.

 <p>If, after possible unwrapping, the new value cannot be
 converted to the type of the underlying field by an identity or
 widening conversion, the method throws an
 <code>IllegalArgumentException</code>.

 <p>If the underlying field is static, the class that declared the
 field is initialized if it has not already been initialized.

 <p>The field is set to the possibly unwrapped and widened new value.

 <p>If the field is hidden in the type of <code>obj</code>,
 the field's value is set according to the preceding rules.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></CODE> - if the underlying constructor
              is inaccessible.<DD><CODE><A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - if the specified object is not an
              instance of the class or interface declaring the underlying
              field (or a subclass or implementor thereof), 
              or if an unwrapping conversion fails.<DD><CODE><A HREF="../../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the specified object is null
              and the field is an instance field.<DD><CODE><A HREF="../../../java/lang/ExceptionInInitializerError.html">ExceptionInInitializerError</A></CODE> - if the initialization provoked
              by this method fails.</DL>
</DD>
</DL>
<HR>

<A NAME="setBoolean(java.lang.Object, boolean)"><!-- --></A><H3>
setBoolean</H3>
<PRE>
public void <B>setBoolean</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;obj,
                       boolean&nbsp;z)
                throws <A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A>,
                       <A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></PRE>
<DL>
<DD>Sets the value of a field as a <code>boolean</code> on the specified object.
 This method is equivalent to
 <code>set(obj, zObj)</code>,
 where <code>zObj</code> is a <code>Boolean</code> object and 
 <code>zObj.booleanValue() == z</code>.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></CODE> - if the underlying constructor
              is inaccessible.<DD><CODE><A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - if the specified object is not an
              instance of the class or interface declaring the underlying
              field (or a subclass or implementor thereof), 
              or if an unwrapping conversion fails.<DD><CODE><A HREF="../../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the specified object is null
              and the field is an instance field.<DD><CODE><A HREF="../../../java/lang/ExceptionInInitializerError.html">ExceptionInInitializerError</A></CODE> - if the initialization provoked
              by this method fails.<DT><B>See Also: </B><DD><A HREF="../../../java/lang/reflect/Field.html#set(java.lang.Object, java.lang.Object)"><CODE>set(java.lang.Object, java.lang.Object)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="setByte(java.lang.Object, byte)"><!-- --></A><H3>
setByte</H3>
<PRE>
public void <B>setByte</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;obj,
                    byte&nbsp;b)
             throws <A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A>,
                    <A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></PRE>
<DL>
<DD>Sets the value of a field as a <code>byte</code> on the specified object.
 This method is equivalent to
 <code>set(obj, bObj)</code>,
 where <code>bObj</code> is a <code>Byte</code> object and 
 <code>bObj.byteValue() == b</code>.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalAccessException.html">IllegalAccessException</A></CODE> - if the underlying constructor