1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<!--NewPage--> 3<HTML> 4<HEAD> 5<!-- Generated by javadoc (build 1.6.0-google-internal) on Mon Jan 04 20:47:59 PST 2010 --> 6<TITLE> 7Closeables (Guava Libraries 2010.01.04) 8</TITLE> 9 10<META NAME="date" CONTENT="2010-01-04"> 11 12<LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"> 13 14<SCRIPT type="text/javascript"> 15function windowTitle() 16{ 17 if (location.href.indexOf('is-external=true') == -1) { 18 parent.document.title="Closeables (Guava Libraries 2010.01.04)"; 19 } 20} 21</SCRIPT> 22<NOSCRIPT> 23</NOSCRIPT> 24 25</HEAD> 26 27<BODY BGCOLOR="white" onload="windowTitle();"> 28<HR> 29 30 31<!-- ========= START OF TOP NAVBAR ======= --> 32<A NAME="navbar_top"><!-- --></A> 33<A HREF="#skip-navbar_top" title="Skip navigation links"></A> 34<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> 35<TR> 36<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> 37<A NAME="navbar_top_firstrow"><!-- --></A> 38<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> 39 <TR ALIGN="center" VALIGN="top"> 40 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> 41 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> 42 <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> 43 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Closeables.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> 44 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> 45 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> 46 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> 47 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> 48 </TR> 49</TABLE> 50</TD> 51<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> 52</EM> 53</TD> 54</TR> 55 56<TR> 57<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 58 <A HREF="../../../../com/google/common/io/CharStreams.html" title="class in com.google.common.io"><B>PREV CLASS</B></A> 59 <A HREF="../../../../com/google/common/io/CountingInputStream.html" title="class in com.google.common.io"><B>NEXT CLASS</B></A></FONT></TD> 60<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 61 <A HREF="../../../../index.html?com/google/common/io/Closeables.html" target="_top"><B>FRAMES</B></A> 62 <A HREF="Closeables.html" target="_top"><B>NO FRAMES</B></A> 63 <SCRIPT type="text/javascript"> 64 <!-- 65 if(window==top) { 66 document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); 67 } 68 //--> 69</SCRIPT> 70<NOSCRIPT> 71 <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A> 72</NOSCRIPT> 73 74 75</FONT></TD> 76</TR> 77<TR> 78<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 79 SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD> 80<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 81DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD> 82</TR> 83</TABLE> 84<A NAME="skip-navbar_top"></A> 85<!-- ========= END OF TOP NAVBAR ========= --> 86 87<HR> 88<!-- ======== START OF CLASS DATA ======== --> 89<H2> 90<FONT SIZE="-1"> 91com.google.common.io</FONT> 92<BR> 93Class Closeables</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.io.Closeables</B> 97</PRE> 98<HR> 99<DL> 100<DT><PRE>public final class <B>Closeables</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> 104Utility methods for working with <A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io"><CODE>Closeable</CODE></A> objects. 105<P> 106 107<P> 108<DL> 109<DT><B>Since:</B></DT> 110 <DD>2009.09.15 <b>tentative</b></DD> 111<DT><B>Author:</B></DT> 112 <DD>Michael Lancaster</DD> 113</DL> 114<HR> 115 116<P> 117 118<!-- ========== METHOD SUMMARY =========== --> 119 120<A NAME="method_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>Method 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 void</CODE></FONT></TD> 129<TD><CODE><B><A HREF="../../../../com/google/common/io/Closeables.html#close(java.io.Closeable, boolean)">close</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A> closeable, 130 boolean swallowIOException)</CODE> 131 132<BR> 133 Closes a <A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io"><CODE>Closeable</CODE></A>, with control over whether an 134 <code>IOException</code> may be thrown.</TD> 135</TR> 136<TR BGCOLOR="white" CLASS="TableRowColor"> 137<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 138<CODE>static void</CODE></FONT></TD> 139<TD><CODE><B><A HREF="../../../../com/google/common/io/Closeables.html#closeQuietly(java.io.Closeable)">closeQuietly</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A> closeable)</CODE> 140 141<BR> 142 Equivalent to calling <code>close(closeable, true)</code>, but with no 143 IOException in the signature.</TD> 144</TR> 145</TABLE> 146 <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> 147<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 148<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> 149<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> 150</TR> 151<TR BGCOLOR="white" CLASS="TableRowColor"> 152<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> 153</TR> 154</TABLE> 155 156<P> 157 158<!-- ============ METHOD DETAIL ========== --> 159 160<A NAME="method_detail"><!-- --></A> 161<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 162<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 163<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> 164<B>Method Detail</B></FONT></TH> 165</TR> 166</TABLE> 167 168<A NAME="close(java.io.Closeable, boolean)"><!-- --></A><H3> 169close</H3> 170<PRE> 171public static void <B>close</B>(<FONT SIZE="-1"><A HREF="http://jsr-305.googlecode.com/svn/trunk/javadoc/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</A></FONT> 172 <A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A> closeable, 173 boolean swallowIOException) 174 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> 175<DL> 176<DD>Closes a <A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io"><CODE>Closeable</CODE></A>, with control over whether an 177 <code>IOException</code> may be thrown. This is primarily useful in a 178 finally block, where a thrown exception needs to be logged but not 179 propagated (otherwise the original exception will be lost). 180 181 <p>If <code>swallowIOException</code> is true then we never throw 182 <code>IOException</code> but merely log it. 183 184 <p>Example: 185 186 <p><pre>public void useStreamNicely() throws IOException { 187 SomeStream stream = new SomeStream("foo"); 188 boolean threw = true; 189 try { 190 // Some code which does something with the Stream. May throw a 191 // Throwable. 192 threw = false; // No throwable thrown. 193 } finally { 194 // Close the stream. 195 // If an exception occurs, only rethrow it if (threw==false). 196 Closeables.close(stream, threw); 197 } 198 </pre> 199<P> 200<DD><DL> 201<DT><B>Parameters:</B><DD><CODE>closeable</CODE> - the <code>Closeable</code> object to be closed, or null, 202 in which case this method does nothing<DD><CODE>swallowIOException</CODE> - if true, don't propagate IO exceptions 203 thrown by the <code>close</code> methods 204<DT><B>Throws:</B> 205<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> - if <code>swallowIOException</code> is false and 206 <code>close</code> throws an <code>IOException</code>.</DL> 207</DD> 208</DL> 209<HR> 210 211<A NAME="closeQuietly(java.io.Closeable)"><!-- --></A><H3> 212closeQuietly</H3> 213<PRE> 214public static void <B>closeQuietly</B>(<FONT SIZE="-1"><A HREF="http://jsr-305.googlecode.com/svn/trunk/javadoc/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</A></FONT> 215 <A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A> closeable)</PRE> 216<DL> 217<DD>Equivalent to calling <code>close(closeable, true)</code>, but with no 218 IOException in the signature. 219<P> 220<DD><DL> 221<DT><B>Parameters:</B><DD><CODE>closeable</CODE> - the <code>Closeable</code> object to be closed, or null, in 222 which case this method does nothing</DL> 223</DD> 224</DL> 225<!-- ========= END OF CLASS DATA ========= --> 226<HR> 227 228 229<!-- ======= START OF BOTTOM NAVBAR ====== --> 230<A NAME="navbar_bottom"><!-- --></A> 231<A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> 232<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> 233<TR> 234<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> 235<A NAME="navbar_bottom_firstrow"><!-- --></A> 236<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> 237 <TR ALIGN="center" VALIGN="top"> 238 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> 239 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> 240 <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> 241 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Closeables.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> 242 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> 243 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> 244 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> 245 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> 246 </TR> 247</TABLE> 248</TD> 249<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> 250</EM> 251</TD> 252</TR> 253 254<TR> 255<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 256 <A HREF="../../../../com/google/common/io/CharStreams.html" title="class in com.google.common.io"><B>PREV CLASS</B></A> 257 <A HREF="../../../../com/google/common/io/CountingInputStream.html" title="class in com.google.common.io"><B>NEXT CLASS</B></A></FONT></TD> 258<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 259 <A HREF="../../../../index.html?com/google/common/io/Closeables.html" target="_top"><B>FRAMES</B></A> 260 <A HREF="Closeables.html" target="_top"><B>NO FRAMES</B></A> 261 <SCRIPT type="text/javascript"> 262 <!-- 263 if(window==top) { 264 document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); 265 } 266 //--> 267</SCRIPT> 268<NOSCRIPT> 269 <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A> 270</NOSCRIPT> 271 272 273</FONT></TD> 274</TR> 275<TR> 276<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 277 SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD> 278<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 279DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD> 280</TR> 281</TABLE> 282<A NAME="skip-navbar_bottom"></A> 283<!-- ======== END OF BOTTOM NAVBAR ======= --> 284 285<HR> 286 287</BODY> 288</HTML> 289
