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6<TITLE>
7LongWritable (Hadoop 0.20.1 API)
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79  SUMMARY:&nbsp;<A HREF="#nested_class_summary">NESTED</A>&nbsp;|&nbsp;FIELD&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
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87<HR>
88<!-- ======== START OF CLASS DATA ======== -->
89<H2>
90<FONT SIZE="-1">
91org.apache.hadoop.io</FONT>
92<BR>
93Class LongWritable</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>org.apache.hadoop.io.LongWritable</B>
97</PRE>
98<DL>
99<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</A>, <A HREF="../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A>, <A HREF="../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</A></DD>
100</DL>
101<HR>
102<DL>
103<DT><PRE>public class <B>LongWritable</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><DT>implements <A HREF="../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</A></DL>
104</PRE>
105
106<P>
107A WritableComparable for longs.
108<P>
109
110<P>
111<HR>
112
113<P>
114<!-- ======== NESTED CLASS SUMMARY ======== -->
115
116<A NAME="nested_class_summary"><!-- --></A>
117<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
118<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
119<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
120<B>Nested Class Summary</B></FONT></TH>
121</TR>
122<TR BGCOLOR="white" CLASS="TableRowColor">
123<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
124<CODE>static&nbsp;class</CODE></FONT></TD>
125<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.Comparator.html" title="class in org.apache.hadoop.io">LongWritable.Comparator</A></B></CODE>
126
127<BR>
128&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator optimized for LongWritable.</TD>
129</TR>
130<TR BGCOLOR="white" CLASS="TableRowColor">
131<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
132<CODE>static&nbsp;class</CODE></FONT></TD>
133<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.DecreasingComparator.html" title="class in org.apache.hadoop.io">LongWritable.DecreasingComparator</A></B></CODE>
134
135<BR>
136&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A decreasing Comparator optimized for LongWritable.</TD>
137</TR>
138</TABLE>
139&nbsp;
140<!-- ======== CONSTRUCTOR SUMMARY ======== -->
141
142<A NAME="constructor_summary"><!-- --></A>
143<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
144<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
145<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
146<B>Constructor Summary</B></FONT></TH>
147</TR>
148<TR BGCOLOR="white" CLASS="TableRowColor">
149<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#LongWritable()">LongWritable</A></B>()</CODE>
150
151<BR>
152&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
153</TR>
154<TR BGCOLOR="white" CLASS="TableRowColor">
155<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#LongWritable(long)">LongWritable</A></B>(long&nbsp;value)</CODE>
156
157<BR>
158&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
159</TR>
160</TABLE>
161&nbsp;
162<!-- ========== METHOD SUMMARY =========== -->
163
164<A NAME="method_summary"><!-- --></A>
165<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
166<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
167<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
168<B>Method Summary</B></FONT></TH>
169</TR>
170<TR BGCOLOR="white" CLASS="TableRowColor">
171<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
172<CODE>&nbsp;int</CODE></FONT></TD>
173<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#compareTo(java.lang.Object)">compareTo</A></B>(<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>&nbsp;o)</CODE>
174
175<BR>
176&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Compares two LongWritables.</TD>
177</TR>
178<TR BGCOLOR="white" CLASS="TableRowColor">
179<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
180<CODE>&nbsp;boolean</CODE></FONT></TD>
181<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#equals(java.lang.Object)">equals</A></B>(<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>&nbsp;o)</CODE>
182
183<BR>
184&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns true iff <code>o</code> is a LongWritable with the same value.</TD>
185</TR>
186<TR BGCOLOR="white" CLASS="TableRowColor">
187<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
188<CODE>&nbsp;long</CODE></FONT></TD>
189<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#get()">get</A></B>()</CODE>
190
191<BR>
192&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return the value of this LongWritable.</TD>
193</TR>
194<TR BGCOLOR="white" CLASS="TableRowColor">
195<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
196<CODE>&nbsp;int</CODE></FONT></TD>
197<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#hashCode()">hashCode</A></B>()</CODE>
198
199<BR>
200&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
201</TR>
202<TR BGCOLOR="white" CLASS="TableRowColor">
203<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
204<CODE>&nbsp;void</CODE></FONT></TD>
205<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#readFields(java.io.DataInput)">readFields</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</A>&nbsp;in)</CODE>
206
207<BR>
208&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deserialize the fields of this object from <code>in</code>.</TD>
209</TR>
210<TR BGCOLOR="white" CLASS="TableRowColor">
211<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
212<CODE>&nbsp;void</CODE></FONT></TD>
213<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#set(long)">set</A></B>(long&nbsp;value)</CODE>
214
215<BR>
216&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set the value of this LongWritable.</TD>
217</TR>
218<TR BGCOLOR="white" CLASS="TableRowColor">
219<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
220<CODE>&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
221<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#toString()">toString</A></B>()</CODE>
222
223<BR>
224&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
225</TR>
226<TR BGCOLOR="white" CLASS="TableRowColor">
227<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
228<CODE>&nbsp;void</CODE></FONT></TD>
229<TD><CODE><B><A HREF="../../../../org/apache/hadoop/io/LongWritable.html#write(java.io.DataOutput)">write</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</A>&nbsp;out)</CODE>
230
231<BR>
232&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Serialize the fields of this object to <code>out</code>.</TD>
233</TR>
234</TABLE>
235&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
236<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
237<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
238<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>
239</TR>
240<TR BGCOLOR="white" CLASS="TableRowColor">
241<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#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#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#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>
242</TR>
243</TABLE>
244&nbsp;
245<P>
246
247<!-- ========= CONSTRUCTOR DETAIL ======== -->
248
249<A NAME="constructor_detail"><!-- --></A>
250<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
251<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
252<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
253<B>Constructor Detail</B></FONT></TH>
254</TR>
255</TABLE>
256
257<A NAME="LongWritable()"><!-- --></A><H3>
258LongWritable</H3>
259<PRE>
260public <B>LongWritable</B>()</PRE>
261<DL>
262</DL>
263<HR>
264
265<A NAME="LongWritable(long)"><!-- --></A><H3>
266LongWritable</H3>
267<PRE>
268public <B>LongWritable</B>(long&nbsp;value)</PRE>
269<DL>
270</DL>
271
272<!-- ============ METHOD DETAIL ========== -->
273
274<A NAME="method_detail"><!-- --></A>
275<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
276<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
277<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
278<B>Method Detail</B></FONT></TH>
279</TR>
280</TABLE>
281
282<A NAME="set(long)"><!-- --></A><H3>
283set</H3>
284<PRE>
285public void <B>set</B>(long&nbsp;value)</PRE>
286<DL>
287<DD>Set the value of this LongWritable.
288<P>
289<DD><DL>
290</DL>
291</DD>
292<DD><DL>
293</DL>
294</DD>
295</DL>
296<HR>
297
298<A NAME="get()"><!-- --></A><H3>
299get</H3>
300<PRE>
301public long <B>get</B>()</PRE>
302<DL>
303<DD>Return the value of this LongWritable.
304<P>
305<DD><DL>
306</DL>
307</DD>
308<DD><DL>
309</DL>
310</DD>
311</DL>
312<HR>
313
314<A NAME="readFields(java.io.DataInput)"><!-- --></A><H3>
315readFields</H3>
316<PRE>
317public void <B>readFields</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</A>&nbsp;in)
318                throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
319<DL>
320<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html#readFields(java.io.DataInput)">Writable</A></CODE></B></DD>
321<DD>Deserialize the fields of this object from <code>in</code>. 
322 
323 <p>For efficiency, implementations should attempt to re-use storage in the
324 existing object where possible.</p>
325<P>
326<DD><DL>
327<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html#readFields(java.io.DataInput)">readFields</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A></CODE></DL>
328</DD>
329<DD><DL>
330<DT><B>Parameters:</B><DD><CODE>in</CODE> - <code>DataInput</code> to deseriablize this object from.
331<DT><B>Throws:</B>
332<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
333</DD>
334</DL>
335<HR>
336
337<A NAME="write(java.io.DataOutput)"><!-- --></A><H3>
338write</H3>
339<PRE>
340public void <B>write</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</A>&nbsp;out)
341           throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
342<DL>
343<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html#write(java.io.DataOutput)">Writable</A></CODE></B></DD>
344<DD>Serialize the fields of this object to <code>out</code>.
345<P>
346<DD><DL>
347<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html#write(java.io.DataOutput)">write</A></CODE> in interface <CODE><A HREF="../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</A></CODE></DL>
348</DD>
349<DD><DL>
350<DT><B>Parameters:</B><DD><CODE>out</CODE> - <code>DataOuput</code> to serialize this object into.
351<DT><B>Throws:</B>
352<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
353</DD>
354</DL>
355<HR>
356
357<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
358equals</H3>
359<PRE>
360public boolean <B>equals</B>(<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>&nbsp;o)</PRE>
361<DL>
362<DD>Returns true iff <code>o</code> is a LongWritable with the same value.
363<P>
364<DD><DL>
365<DT><B>Overrides:</B><DD><CODE><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></CODE> in class <CODE><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></CODE></DL>
366</DD>
367<DD><DL>
368</DL>
369</DD>
370</DL>
371<HR>
372
373<A NAME="hashCode()"><!-- --></A><H3>
374hashCode</H3>
375<PRE>
376public int <B>hashCode</B>()</PRE>
377<DL>
378<DD><DL>
379<DT><B>Overrides:</B><DD><CODE><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></CODE> in class <CODE><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></CODE></DL>
380</DD>
381<DD><DL>
382</DL>
383</DD>
384</DL>
385<HR>
386
387<A NAME="compareTo(java.lang.Object)"><!-- --></A><H3>
388compareTo</H3>
389<PRE>
390public int <B>compareTo</B>(<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>&nbsp;o)</PRE>
391<DL>
392<DD>Compares two LongWritables.
393<P>
394<DD><DL>
395<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true#compareTo(T)" title="class or interface in java.lang">compareTo</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</A></CODE></DL>
396</DD>
397<DD><DL>
398</DL>
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404toString</H3>
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406public <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>toString</B>()</PRE>
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