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7Primitives (Guava Libraries 2010.01.04)
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91com.google.common.primitives</FONT>
92<BR>
93Class Primitives</H2>
94<PRE>
95<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
96  <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.google.common.primitives.Primitives</B>
97</PRE>
98<HR>
99<DL>
100<DT><PRE>public final class <B>Primitives</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
101</PRE>
102
103<P>
104Contains static utility methods pertaining to primitive types and their
105 corresponding wrapper types.
106<P>
107
108<P>
109<DL>
110<DT><B>Since:</B></DT>
111  <DD>2009.09.15 <b>tentative</b></DD>
112<DT><B>Author:</B></DT>
113  <DD>Kevin Bourrillion</DD>
114</DL>
115<HR>
116
117<P>
118<!-- =========== FIELD SUMMARY =========== -->
119
120<A NAME="field_summary"><!-- --></A>
121<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
122<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
123<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
124<B>Field Summary</B></FONT></TH>
125</TR>
126<TR BGCOLOR="white" CLASS="TableRowColor">
127<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
128<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A>&lt;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;,<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&gt;</CODE></FONT></TD>
129<TD><CODE><B><A HREF="../../../../com/google/common/primitives/Primitives.html#PRIMITIVE_TO_WRAPPER_TYPE">PRIMITIVE_TO_WRAPPER_TYPE</A></B></CODE>
130
131<BR>
132&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A map from primitive types to their corresponding wrapper types.</TD>
133</TR>
134<TR BGCOLOR="white" CLASS="TableRowColor">
135<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
136<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</A>&lt;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&gt;</CODE></FONT></TD>
137<TD><CODE><B><A HREF="../../../../com/google/common/primitives/Primitives.html#PRIMITIVE_TYPES">PRIMITIVE_TYPES</A></B></CODE>
138
139<BR>
140&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All nine primitive types (including void).</TD>
141</TR>
142<TR BGCOLOR="white" CLASS="TableRowColor">
143<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
144<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A>&lt;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;,<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&gt;</CODE></FONT></TD>
145<TD><CODE><B><A HREF="../../../../com/google/common/primitives/Primitives.html#WRAPPER_TO_PRIMITIVE_TYPE">WRAPPER_TO_PRIMITIVE_TYPE</A></B></CODE>
146
147<BR>
148&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A map from wrapper types to their corresponding primitive types.</TD>
149</TR>
150<TR BGCOLOR="white" CLASS="TableRowColor">
151<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
152<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</A>&lt;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&gt;</CODE></FONT></TD>
153<TD><CODE><B><A HREF="../../../../com/google/common/primitives/Primitives.html#WRAPPER_TYPES">WRAPPER_TYPES</A></B></CODE>
154
155<BR>
156&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All nine wrapper types (including Void).</TD>
157</TR>
158</TABLE>
159&nbsp;
160<!-- ========== METHOD SUMMARY =========== -->
161
162<A NAME="method_summary"><!-- --></A>
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165<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
166<B>Method Summary</B></FONT></TH>
167</TR>
168<TR BGCOLOR="white" CLASS="TableRowColor">
169<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
170<CODE>static&nbsp;boolean</CODE></FONT></TD>
171<TD><CODE><B><A HREF="../../../../com/google/common/primitives/Primitives.html#isWrapperType(java.lang.Class)">isWrapperType</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&nbsp;type)</CODE>
172
173<BR>
174&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns <code>true</code> if <code>type</code> is one of the nine
175 primitive-wrapper types, such as <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang"><CODE>Integer</CODE></A>.</TD>
176</TR>
177<TR BGCOLOR="white" CLASS="TableRowColor">
178<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
179<CODE>static
180<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY="">
181<TR ALIGN="right" VALIGN="">
182<TD NOWRAP><FONT SIZE="-1">
183<CODE>&lt;T&gt; <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;T&gt;</CODE></FONT></TD>
184</TR>
185</TABLE>
186</CODE></FONT></TD>
187<TD><CODE><B><A HREF="../../../../com/google/common/primitives/Primitives.html#unwrap(java.lang.Class)">unwrap</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;T&gt;&nbsp;type)</CODE>
188
189<BR>
190&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the corresponding primitive type of <code>type</code> if it is a
191 wrapper type; otherwise returns <code>type</code> itself.</TD>
192</TR>
193<TR BGCOLOR="white" CLASS="TableRowColor">
194<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
195<CODE>static
196<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY="">
197<TR ALIGN="right" VALIGN="">
198<TD NOWRAP><FONT SIZE="-1">
199<CODE>&lt;T&gt; <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;T&gt;</CODE></FONT></TD>
200</TR>
201</TABLE>
202</CODE></FONT></TD>
203<TD><CODE><B><A HREF="../../../../com/google/common/primitives/Primitives.html#wrap(java.lang.Class)">wrap</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;T&gt;&nbsp;type)</CODE>
204
205<BR>
206&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the corresponding wrapper type of <code>type</code> if it is a primitive
207 type; otherwise returns <code>type</code> itself.</TD>
208</TR>
209</TABLE>
210&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
211<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
212<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
213<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
214</TR>
215<TR BGCOLOR="white" CLASS="TableRowColor">
216<TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
217</TR>
218</TABLE>
219&nbsp;
220<P>
221
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228<B>Field Detail</B></FONT></TH>
229</TR>
230</TABLE>
231
232<A NAME="PRIMITIVE_TO_WRAPPER_TYPE"><!-- --></A><H3>
233PRIMITIVE_TO_WRAPPER_TYPE</H3>
234<PRE>
235public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A>&lt;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;,<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&gt; <B>PRIMITIVE_TO_WRAPPER_TYPE</B></PRE>
236<DL>
237<DD>A map from primitive types to their corresponding wrapper types.
238<P>
239<DL>
240</DL>
241</DL>
242<HR>
243
244<A NAME="WRAPPER_TO_PRIMITIVE_TYPE"><!-- --></A><H3>
245WRAPPER_TO_PRIMITIVE_TYPE</H3>
246<PRE>
247public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A>&lt;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;,<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&gt; <B>WRAPPER_TO_PRIMITIVE_TYPE</B></PRE>
248<DL>
249<DD>A map from wrapper types to their corresponding primitive types.
250<P>
251<DL>
252</DL>
253</DL>
254<HR>
255
256<A NAME="PRIMITIVE_TYPES"><!-- --></A><H3>
257PRIMITIVE_TYPES</H3>
258<PRE>
259public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</A>&lt;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&gt; <B>PRIMITIVE_TYPES</B></PRE>
260<DL>
261<DD>All nine primitive types (including void).
262<P>
263<DL>
264</DL>
265</DL>
266<HR>
267
268<A NAME="WRAPPER_TYPES"><!-- --></A><H3>
269WRAPPER_TYPES</H3>
270<PRE>
271public static final <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</A>&lt;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&gt; <B>WRAPPER_TYPES</B></PRE>
272<DL>
273<DD>All nine wrapper types (including Void).
274<P>
275<DL>
276</DL>
277</DL>
278
279<!-- ============ METHOD DETAIL ========== -->
280
281<A NAME="method_detail"><!-- --></A>
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283<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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285<B>Method Detail</B></FONT></TH>
286</TR>
287</TABLE>
288
289<A NAME="isWrapperType(java.lang.Class)"><!-- --></A><H3>
290isWrapperType</H3>
291<PRE>
292public static boolean <B>isWrapperType</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;?&gt;&nbsp;type)</PRE>
293<DL>
294<DD>Returns <code>true</code> if <code>type</code> is one of the nine
295 primitive-wrapper types, such as <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang"><CODE>Integer</CODE></A>.
296<P>
297<DD><DL>
298<DT><B>See Also:</B><DD><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true#isPrimitive()" title="class or interface in java.lang"><CODE>Class.isPrimitive()</CODE></A></DL>
299</DD>
300</DL>
301<HR>
302
303<A NAME="wrap(java.lang.Class)"><!-- --></A><H3>
304wrap</H3>
305<PRE>
306public static &lt;T&gt; <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;T&gt; <B>wrap</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;T&gt;&nbsp;type)</PRE>
307<DL>
308<DD>Returns the corresponding wrapper type of <code>type</code> if it is a primitive
309 type; otherwise returns <code>type</code> itself. Idempotent.
310 <pre>
311     wrap(int.class) == Integer.class
312     wrap(Integer.class) == Integer.class
313     wrap(String.class) == String.class
314 </pre>
315<P>
316<DD><DL>
317</DL>
318</DD>
319</DL>
320<HR>
321
322<A NAME="unwrap(java.lang.Class)"><!-- --></A><H3>
323unwrap</H3>
324<PRE>
325public static &lt;T&gt; <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;T&gt; <B>unwrap</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A>&lt;T&gt;&nbsp;type)</PRE>
326<DL>
327<DD>Returns the corresponding primitive type of <code>type</code> if it is a
328 wrapper type; otherwise returns <code>type</code> itself. Idempotent.
329 <pre>
330     unwrap(Integer.class) == int.class
331     unwrap(int.class) == int.class
332     unwrap(String.class) == String.class
333 </pre>
334<P>
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