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5	<!-- Generated by javadoc (build 1.6.0_07) on Tue Sep 01 20:56:55 UTC 2009 -->
6	<TITLE>
7	DataChecksum (Hadoop 0.20.1 API)
8	</TITLE>
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89	<H2>
90	<FONT SIZE="-1">
91	org.apache.hadoop.util</FONT>
92	<BR>
93	Class DataChecksum</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.util.DataChecksum</B>
97	</PRE>
98	<DL>
99	<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true" title="class or interface in java.util.zip">Checksum</A></DD>
100	</DL>
101	<HR>
102	<DL>
103	<DT><PRE>public class <B>DataChecksum</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="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true" title="class or interface in java.util.zip">Checksum</A></DL>
104	</PRE>
105
106	<P>
107	This class provides inteface and utilities for processing checksums for
108	DFS data transfers.
109	<P>
110
111	<P>
112	<HR>
113
114	<P>
115	<!-- =========== FIELD SUMMARY =========== -->
116
117	<A NAME="field_summary"><!-- --></A>
118	<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
119	<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
120	<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
121	<B>Field Summary</B></FONT></TH>
122	</TR>
123	<TR BGCOLOR="white" CLASS="TableRowColor">
124	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
125	<CODE>static int</CODE></FONT></TD>
126	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#CHECKSUM_CRC32">CHECKSUM_CRC32</A></B></CODE>
127
128	<BR>
129	</TD>
130	</TR>
131	<TR BGCOLOR="white" CLASS="TableRowColor">
132	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
133	<CODE>static int</CODE></FONT></TD>
134	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#CHECKSUM_NULL">CHECKSUM_NULL</A></B></CODE>
135
136	<BR>
137	</TD>
138	</TR>
139	<TR BGCOLOR="white" CLASS="TableRowColor">
140	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
141	<CODE>static int</CODE></FONT></TD>
142	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#HEADER_LEN">HEADER_LEN</A></B></CODE>
143
144	<BR>
145	</TD>
146	</TR>
147	<TR BGCOLOR="white" CLASS="TableRowColor">
148	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
149	<CODE>static int</CODE></FONT></TD>
150	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#SIZE_OF_INTEGER">SIZE_OF_INTEGER</A></B></CODE>
151
152	<BR>
153	</TD>
154	</TR>
155	</TABLE>
156
157	<!-- ========== METHOD SUMMARY =========== -->
158
159	<A NAME="method_summary"><!-- --></A>
160	<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
161	<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
162	<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
163	<B>Method Summary</B></FONT></TH>
164	</TR>
165	<TR BGCOLOR="white" CLASS="TableRowColor">
166	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
167	<CODE> boolean</CODE></FONT></TD>
168	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#compare(byte[], int)">compare</A></B>(byte[] buf,
169	int offset)</CODE>
170
171	<BR>
172	Compares the checksum located at buf[offset] with the current checksum.</TD>
173	</TR>
174	<TR BGCOLOR="white" CLASS="TableRowColor">
175	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
176	<CODE> int</CODE></FONT></TD>
177	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#getBytesPerChecksum()">getBytesPerChecksum</A></B>()</CODE>
178
179	<BR>
180	</TD>
181	</TR>
182	<TR BGCOLOR="white" CLASS="TableRowColor">
183	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
184	<CODE>static int</CODE></FONT></TD>
185	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#getChecksumHeaderSize()">getChecksumHeaderSize</A></B>()</CODE>
186
187	<BR>
188	</TD>
189	</TR>
190	<TR BGCOLOR="white" CLASS="TableRowColor">
191	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
192	<CODE> int</CODE></FONT></TD>
193	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#getChecksumSize()">getChecksumSize</A></B>()</CODE>
194
195	<BR>
196	</TD>
197	</TR>
198	<TR BGCOLOR="white" CLASS="TableRowColor">
199	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
200	<CODE> int</CODE></FONT></TD>
201	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#getChecksumType()">getChecksumType</A></B>()</CODE>
202
203	<BR>
204	</TD>
205	</TR>
206	<TR BGCOLOR="white" CLASS="TableRowColor">
207	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
208	<CODE> byte[]</CODE></FONT></TD>
209	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#getHeader()">getHeader</A></B>()</CODE>
210
211	<BR>
212	</TD>
213	</TR>
214	<TR BGCOLOR="white" CLASS="TableRowColor">
215	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
216	<CODE> int</CODE></FONT></TD>
217	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#getNumBytesInSum()">getNumBytesInSum</A></B>()</CODE>
218
219	<BR>
220	</TD>
221	</TR>
222	<TR BGCOLOR="white" CLASS="TableRowColor">
223	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
224	<CODE> long</CODE></FONT></TD>
225	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#getValue()">getValue</A></B>()</CODE>
226
227	<BR>
228	</TD>
229	</TR>
230	<TR BGCOLOR="white" CLASS="TableRowColor">
231	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
232	<CODE>static <A HREF="../../../../org/apache/hadoop/util/DataChecksum.html" title="class in org.apache.hadoop.util">DataChecksum</A></CODE></FONT></TD>
233	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#newDataChecksum(byte[], int)">newDataChecksum</A></B>(byte[] bytes,
234	int offset)</CODE>
235
236	<BR>
237	Creates a DataChecksum from HEADER_LEN bytes from arr[offset].</TD>
238	</TR>
239	<TR BGCOLOR="white" CLASS="TableRowColor">
240	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
241	<CODE>static <A HREF="../../../../org/apache/hadoop/util/DataChecksum.html" title="class in org.apache.hadoop.util">DataChecksum</A></CODE></FONT></TD>
242	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#newDataChecksum(java.io.DataInputStream)">newDataChecksum</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataInputStream.html?is-external=true" title="class or interface in java.io">DataInputStream</A> in)</CODE>
243
244	<BR>
245	This constructucts a DataChecksum by reading HEADER_LEN bytes from
246	input stream <i>in</i></TD>
247	</TR>
248	<TR BGCOLOR="white" CLASS="TableRowColor">
249	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
250	<CODE>static <A HREF="../../../../org/apache/hadoop/util/DataChecksum.html" title="class in org.apache.hadoop.util">DataChecksum</A></CODE></FONT></TD>
251	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#newDataChecksum(int, int)">newDataChecksum</A></B>(int type,
252	int bytesPerChecksum)</CODE>
253
254	<BR>
255	</TD>
256	</TR>
257	<TR BGCOLOR="white" CLASS="TableRowColor">
258	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
259	<CODE> void</CODE></FONT></TD>
260	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#reset()">reset</A></B>()</CODE>
261
262	<BR>
263	</TD>
264	</TR>
265	<TR BGCOLOR="white" CLASS="TableRowColor">
266	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
267	<CODE> void</CODE></FONT></TD>
268	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#update(byte[], int, int)">update</A></B>(byte[] b,
269	int off,
270	int len)</CODE>
271
272	<BR>
273	</TD>
274	</TR>
275	<TR BGCOLOR="white" CLASS="TableRowColor">
276	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
277	<CODE> void</CODE></FONT></TD>
278	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#update(int)">update</A></B>(int b)</CODE>
279
280	<BR>
281	</TD>
282	</TR>
283	<TR BGCOLOR="white" CLASS="TableRowColor">
284	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
285	<CODE> void</CODE></FONT></TD>
286	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#writeHeader(java.io.DataOutputStream)">writeHeader</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataOutputStream.html?is-external=true" title="class or interface in java.io">DataOutputStream</A> out)</CODE>
287
288	<BR>
289	Writes the checksum header to the output stream <i>out</i>.</TD>
290	</TR>
291	<TR BGCOLOR="white" CLASS="TableRowColor">
292	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
293	<CODE> int</CODE></FONT></TD>
294	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#writeValue(byte[], int, boolean)">writeValue</A></B>(byte[] buf,
295	int offset,
296	boolean reset)</CODE>
297
298	<BR>
299	Writes the current checksum to a buffer.</TD>
300	</TR>
301	<TR BGCOLOR="white" CLASS="TableRowColor">
302	<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
303	<CODE> int</CODE></FONT></TD>
304	<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DataChecksum.html#writeValue(java.io.DataOutputStream, boolean)">writeValue</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataOutputStream.html?is-external=true" title="class or interface in java.io">DataOutputStream</A> out,
305	boolean reset)</CODE>
306
307	<BR>
308	Writes the current checksum to the stream.</TD>
309	</TR>
310	</TABLE>
311	<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
312	<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
313	<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
314	<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>
315	</TR>
316	<TR BGCOLOR="white" CLASS="TableRowColor">
317	<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>
318	</TR>
319	</TABLE>
320
321	<P>
322
323	<!-- ============ FIELD DETAIL =========== -->
324
325	<A NAME="field_detail"><!-- --></A>
326	<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
327	<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
328	<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
329	<B>Field Detail</B></FONT></TH>
330	</TR>
331	</TABLE>
332
333	<A NAME="HEADER_LEN"><!-- --></A><H3>
334	HEADER_LEN</H3>
335	<PRE>
336	public static final int <B>HEADER_LEN</B></PRE>
337	<DL>
338	<DL>
339	<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.util.DataChecksum.HEADER_LEN">Constant Field Values</A></DL>
340	</DL>
341	<HR>
342
343	<A NAME="CHECKSUM_NULL"><!-- --></A><H3>
344	CHECKSUM_NULL</H3>
345	<PRE>
346	public static final int <B>CHECKSUM_NULL</B></PRE>
347	<DL>
348	<DL>
349	<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.util.DataChecksum.CHECKSUM_NULL">Constant Field Values</A></DL>
350	</DL>
351	<HR>
352
353	<A NAME="CHECKSUM_CRC32"><!-- --></A><H3>
354	CHECKSUM_CRC32</H3>
355	<PRE>
356	public static final int <B>CHECKSUM_CRC32</B></PRE>
357	<DL>
358	<DL>
359	<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.util.DataChecksum.CHECKSUM_CRC32">Constant Field Values</A></DL>
360	</DL>
361	<HR>
362
363	<A NAME="SIZE_OF_INTEGER"><!-- --></A><H3>
364	SIZE_OF_INTEGER</H3>
365	<PRE>
366	public static final int <B>SIZE_OF_INTEGER</B></PRE>
367	<DL>
368	<DL>
369	<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.hadoop.util.DataChecksum.SIZE_OF_INTEGER">Constant Field Values</A></DL>
370	</DL>
371
372	<!-- ============ METHOD DETAIL ========== -->
373
374	<A NAME="method_detail"><!-- --></A>
375	<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
376	<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
377	<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
378	<B>Method Detail</B></FONT></TH>
379	</TR>
380	</TABLE>
381
382	<A NAME="newDataChecksum(int, int)"><!-- --></A><H3>
383	newDataChecksum</H3>
384	<PRE>
385	public static <A HREF="../../../../org/apache/hadoop/util/DataChecksum.html" title="class in org.apache.hadoop.util">DataChecksum</A> <B>newDataChecksum</B>(int type,
386	int bytesPerChecksum)</PRE>
387	<DL>
388	<DD><DL>
389	</DL>
390	</DD>
391	<DD><DL>
392	</DL>
393	</DD>
394	</DL>
395	<HR>
396
397	<A NAME="newDataChecksum(byte[], int)"><!-- --></A><H3>
398	newDataChecksum</H3>
399	<PRE>
400	public static <A HREF="../../../../org/apache/hadoop/util/DataChecksum.html" title="class in org.apache.hadoop.util">DataChecksum</A> <B>newDataChecksum</B>(byte[] bytes,
401	int offset)</PRE>
402	<DL>
403	<DD>Creates a DataChecksum from HEADER_LEN bytes from arr[offset].
404	<P>
405	<DD><DL>
406	</DL>
407	</DD>
408	<DD><DL>
409
410	<DT><B>Returns:</B><DD>DataChecksum of the type in the array or null in case of an error.</DL>
411	</DD>
412	</DL>
413	<HR>
414
415	<A NAME="newDataChecksum(java.io.DataInputStream)"><!-- --></A><H3>
416	newDataChecksum</H3>
417	<PRE>
418	public static <A HREF="../../../../org/apache/hadoop/util/DataChecksum.html" title="class in org.apache.hadoop.util">DataChecksum</A> <B>newDataChecksum</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataInputStream.html?is-external=true" title="class or interface in java.io">DataInputStream</A> in)
419	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>
420	<DL>
421	<DD>This constructucts a DataChecksum by reading HEADER_LEN bytes from
422	input stream <i>in</i>
423	<P>
424	<DD><DL>
425	</DL>
426	</DD>
427	<DD><DL>
428
429	<DT><B>Throws:</B>
430	<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>
431	</DD>
432	</DL>
433	<HR>
434
435	<A NAME="writeHeader(java.io.DataOutputStream)"><!-- --></A><H3>
436	writeHeader</H3>
437	<PRE>
438	public void <B>writeHeader</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataOutputStream.html?is-external=true" title="class or interface in java.io">DataOutputStream</A> out)
439	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>
440	<DL>
441	<DD>Writes the checksum header to the output stream <i>out</i>.
442	<P>
443	<DD><DL>
444	</DL>
445	</DD>
446	<DD><DL>
447
448	<DT><B>Throws:</B>
449	<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>
450	</DD>
451	</DL>
452	<HR>
453
454	<A NAME="getHeader()"><!-- --></A><H3>
455	getHeader</H3>
456	<PRE>
457	public byte[] <B>getHeader</B>()</PRE>
458	<DL>
459	<DD><DL>
460	</DL>
461	</DD>
462	<DD><DL>
463	</DL>
464	</DD>
465	</DL>
466	<HR>
467
468	<A NAME="writeValue(java.io.DataOutputStream, boolean)"><!-- --></A><H3>
469	writeValue</H3>
470	<PRE>
471	public int <B>writeValue</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/DataOutputStream.html?is-external=true" title="class or interface in java.io">DataOutputStream</A> out,
472	boolean reset)
473	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>
474	<DL>
475	<DD>Writes the current checksum to the stream.
476	If <i>reset</i> is true, then resets the checksum.
477	<P>
478	<DD><DL>
479	</DL>
480	</DD>
481	<DD><DL>
482
483	<DT><B>Returns:</B><DD>number of bytes written. Will be equal to getChecksumSize();
484	<DT><B>Throws:</B>
485	<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>
486	</DD>
487	</DL>
488	<HR>
489
490	<A NAME="writeValue(byte[], int, boolean)"><!-- --></A><H3>
491	writeValue</H3>
492	<PRE>
493	public int <B>writeValue</B>(byte[] buf,
494	int offset,
495	boolean reset)
496	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>
497	<DL>
498	<DD>Writes the current checksum to a buffer.
499	If <i>reset</i> is true, then resets the checksum.
500	<P>
501	<DD><DL>
502	</DL>
503	</DD>
504	<DD><DL>
505
506	<DT><B>Returns:</B><DD>number of bytes written. Will be equal to getChecksumSize();
507	<DT><B>Throws:</B>
508	<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>
509	</DD>
510	</DL>
511	<HR>
512
513	<A NAME="compare(byte[], int)"><!-- --></A><H3>
514	compare</H3>
515	<PRE>
516	public boolean <B>compare</B>(byte[] buf,
517	int offset)</PRE>
518	<DL>
519	<DD>Compares the checksum located at buf[offset] with the current checksum.
520	<P>
521	<DD><DL>
522	</DL>
523	</DD>
524	<DD><DL>
525
526	<DT><B>Returns:</B><DD>true if the checksum matches and false otherwise.</DL>
527	</DD>
528	</DL>
529	<HR>
530
531	<A NAME="getChecksumType()"><!-- --></A><H3>
532	getChecksumType</H3>
533	<PRE>
534	public int <B>getChecksumType</B>()</PRE>
535	<DL>
536	<DD><DL>
537	</DL>
538	</DD>
539	<DD><DL>
540	</DL>
541	</DD>
542	</DL>
543	<HR>
544
545	<A NAME="getChecksumSize()"><!-- --></A><H3>
546	getChecksumSize</H3>
547	<PRE>
548	public int <B>getChecksumSize</B>()</PRE>
549	<DL>
550	<DD><DL>
551	</DL>
552	</DD>
553	<DD><DL>
554	</DL>
555	</DD>
556	</DL>
557	<HR>
558
559	<A NAME="getBytesPerChecksum()"><!-- --></A><H3>
560	getBytesPerChecksum</H3>
561	<PRE>
562	public int <B>getBytesPerChecksum</B>()</PRE>
563	<DL>
564	<DD><DL>
565	</DL>
566	</DD>
567	<DD><DL>
568	</DL>
569	</DD>
570	</DL>
571	<HR>
572
573	<A NAME="getNumBytesInSum()"><!-- --></A><H3>
574	getNumBytesInSum</H3>
575	<PRE>
576	public int <B>getNumBytesInSum</B>()</PRE>
577	<DL>
578	<DD><DL>
579	</DL>
580	</DD>
581	<DD><DL>
582	</DL>
583	</DD>
584	</DL>
585	<HR>
586
587	<A NAME="getChecksumHeaderSize()"><!-- --></A><H3>
588	getChecksumHeaderSize</H3>
589	<PRE>
590	public static int <B>getChecksumHeaderSize</B>()</PRE>
591	<DL>
592	<DD><DL>
593	</DL>
594	</DD>
595	<DD><DL>
596	</DL>
597	</DD>
598	</DL>
599	<HR>
600
601	<A NAME="getValue()"><!-- --></A><H3>
602	getValue</H3>
603	<PRE>
604	public long <B>getValue</B>()</PRE>
605	<DL>
606	<DD><DL>
607	<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true#getValue()" title="class or interface in java.util.zip">getValue</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true" title="class or interface in java.util.zip">Checksum</A></CODE></DL>
608	</DD>
609	<DD><DL>
610	</DL>
611	</DD>
612	</DL>
613	<HR>
614
615	<A NAME="reset()"><!-- --></A><H3>
616	reset</H3>
617	<PRE>
618	public void <B>reset</B>()</PRE>
619	<DL>
620	<DD><DL>
621	<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true#reset()" title="class or interface in java.util.zip">reset</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true" title="class or interface in java.util.zip">Checksum</A></CODE></DL>
622	</DD>
623	<DD><DL>
624	</DL>
625	</DD>
626	</DL>
627	<HR>
628
629	<A NAME="update(byte[], int, int)"><!-- --></A><H3>
630	update</H3>
631	<PRE>
632	public void <B>update</B>(byte[] b,
633	int off,
634	int len)</PRE>
635	<DL>
636	<DD><DL>
637	<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true#update(byte[], int, int)" title="class or interface in java.util.zip">update</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true" title="class or interface in java.util.zip">Checksum</A></CODE></DL>
638	</DD>
639	<DD><DL>
640	</DL>
641	</DD>
642	</DL>
643	<HR>
644
645	<A NAME="update(int)"><!-- --></A><H3>
646	update</H3>
647	<PRE>
648	public void <B>update</B>(int b)</PRE>
649	<DL>
650	<DD><DL>
651	<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true#update(int)" title="class or interface in java.util.zip">update</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/zip/Checksum.html?is-external=true" title="class or interface in java.util.zip">Checksum</A></CODE></DL>
652	</DD>
653	<DD><DL>
654	</DL>
655	</DD>
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