<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!--NewPage--> <HTML> <HEAD> <!-- Generated by javadoc (build 1.7.0-internal) on Tue Mar 04 15:24:49 EST 2008 --> <TITLE> Uses of Package org.apache.log4j (Log4j Version 1.2.14) </TITLE> <META NAME="date" CONTENT="2008-03-04"> <LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"> <SCRIPT type="text/javascript"> function windowTitle() { if (location.href.indexOf('is-external=true') == -1) { parent.document.title="Uses of Package org.apache.log4j (Log4j Version 1.2.14)"; } } </SCRIPT> <NOSCRIPT> </NOSCRIPT> </HEAD> <BODY BGCOLOR="white" onload="windowTitle();"> <HR> <!-- ========= START OF TOP NAVBAR ======= --> <A NAME="navbar_top"><!-- --></A> <A HREF="#skip-navbar_top" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> <TR> <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A 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CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Packages that use <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j"><B>org.apache.log4j</B></A></TD> <TD>The main log4j package. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.config"><B>org.apache.log4j.config</B></A></TD> <TD>Package used in getting/setting component properties. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.helpers"><B>org.apache.log4j.helpers</B></A></TD> <TD>This package is used internally. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.jdbc"><B>org.apache.log4j.jdbc</B></A></TD> <TD>The JDBCAppender provides for sending log events to a database. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.jmx"><B>org.apache.log4j.jmx</B></A></TD> <TD>This package lets you manage log4j settings using JMX. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.lf5"><B>org.apache.log4j.lf5</B></A></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.net"><B>org.apache.log4j.net</B></A></TD> <TD>Package for remote logging. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.nt"><B>org.apache.log4j.nt</B></A></TD> <TD>Package for NT event logging. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.performance"><B>org.apache.log4j.performance</B></A></TD> <TD>Package to measure the performance of the different log4j components. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.spi"><B>org.apache.log4j.spi</B></A></TD> <TD>Contains part of the System Programming Interface (SPI) needed to extend log4j. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.varia"><B>org.apache.log4j.varia</B></A></TD> <TD>Contains various appenders, filters and other odds and ends. </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><A HREF="#org.apache.log4j.xml"><B>org.apache.log4j.xml</B></A></TD> <TD>XML based components. </TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/AppenderSkeleton.html#org.apache.log4j"><B>AppenderSkeleton</B></A></B> <BR> Abstract superclass of the other appenders in the package.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Category.html#org.apache.log4j"><B>Category</B></A></B> <BR> <font color="#AA2222"><b>This class has been deprecated and replaced by the <A HREF="../../../org/apache/log4j/Logger.html" title="class in org.apache.log4j"><CODE>Logger</CODE></A> <em>subclass</em></b></font>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/FileAppender.html#org.apache.log4j"><B>FileAppender</B></A></B> <BR> FileAppender appends log events to a file.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Layout.html#org.apache.log4j"><B>Layout</B></A></B> <BR> Extend this abstract class to create your own log layout format.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Level.html#org.apache.log4j"><B>Level</B></A></B> <BR> Defines the minimum set of levels recognized by the system, that is <code>OFF</code>, <code>FATAL</code>, <code>ERROR</code>, <code>WARN</code>, <code>INFO</code, <code>DEBUG</code> and <code>ALL</code>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Logger.html#org.apache.log4j"><B>Logger</B></A></B> <BR> This is the central class in the log4j package.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Priority.html#org.apache.log4j"><B>Priority</B></A></B> <BR> <font color="#AA4444">Refrain from using this class directly, use the <A HREF="../../../org/apache/log4j/Level.html" title="class in org.apache.log4j"><CODE>Level</CODE></A> class instead</font>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/WriterAppender.html#org.apache.log4j"><B>WriterAppender</B></A></B> <BR> WriterAppender appends log events to a <A HREF="/usr/share/javadoc/java/java/io/Writer.html?is-external=true" title="class or interface in java.io"><CODE>Writer</CODE></A> or an <A HREF="/usr/share/javadoc/java/java/io/OutputStream.html?is-external=true" title="class or interface in java.io"><CODE>OutputStream</CODE></A> depending on the user's choice.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.config"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/config/package-summary.html">org.apache.log4j.config</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Logger.html#org.apache.log4j.config"><B>Logger</B></A></B> <BR> This is the central class in the log4j package.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.helpers"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/helpers/package-summary.html">org.apache.log4j.helpers</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.helpers"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Layout.html#org.apache.log4j.helpers"><B>Layout</B></A></B> <BR> Extend this abstract class to create your own log layout format.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Level.html#org.apache.log4j.helpers"><B>Level</B></A></B> <BR> Defines the minimum set of levels recognized by the system, that is <code>OFF</code>, <code>FATAL</code>, <code>ERROR</code>, <code>WARN</code>, <code>INFO</code, <code>DEBUG</code> and <code>ALL</code>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Logger.html#org.apache.log4j.helpers"><B>Logger</B></A></B> <BR> This is the central class in the log4j package.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.jdbc"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/jdbc/package-summary.html">org.apache.log4j.jdbc</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.jdbc"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/AppenderSkeleton.html#org.apache.log4j.jdbc"><B>AppenderSkeleton</B></A></B> <BR> Abstract superclass of the other appenders in the package.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.jmx"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/jmx/package-summary.html">org.apache.log4j.jmx</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.jmx"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Category.html#org.apache.log4j.jmx"><B>Category</B></A></B> <BR> <font color="#AA2222"><b>This class has been deprecated and replaced by the <A HREF="../../../org/apache/log4j/Logger.html" title="class in org.apache.log4j"><CODE>Logger</CODE></A> <em>subclass</em></b></font>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Layout.html#org.apache.log4j.jmx"><B>Layout</B></A></B> <BR> Extend this abstract class to create your own log layout format.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Logger.html#org.apache.log4j.jmx"><B>Logger</B></A></B> <BR> This is the central class in the log4j package.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.lf5"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/lf5/package-summary.html">org.apache.log4j.lf5</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.lf5"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/AppenderSkeleton.html#org.apache.log4j.lf5"><B>AppenderSkeleton</B></A></B> <BR> Abstract superclass of the other appenders in the package.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.net"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/net/package-summary.html">org.apache.log4j.net</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.net"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/AppenderSkeleton.html#org.apache.log4j.net"><B>AppenderSkeleton</B></A></B> <BR> Abstract superclass of the other appenders in the package.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Layout.html#org.apache.log4j.net"><B>Layout</B></A></B> <BR> Extend this abstract class to create your own log layout format.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.nt"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/nt/package-summary.html">org.apache.log4j.nt</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.nt"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/AppenderSkeleton.html#org.apache.log4j.nt"><B>AppenderSkeleton</B></A></B> <BR> Abstract superclass of the other appenders in the package.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Layout.html#org.apache.log4j.nt"><B>Layout</B></A></B> <BR> Extend this abstract class to create your own log layout format.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.performance"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/performance/package-summary.html">org.apache.log4j.performance</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.performance"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/AppenderSkeleton.html#org.apache.log4j.performance"><B>AppenderSkeleton</B></A></B> <BR> Abstract superclass of the other appenders in the package.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Layout.html#org.apache.log4j.performance"><B>Layout</B></A></B> <BR> Extend this abstract class to create your own log layout format.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.spi"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/spi/package-summary.html">org.apache.log4j.spi</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.spi"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Category.html#org.apache.log4j.spi"><B>Category</B></A></B> <BR> <font color="#AA2222"><b>This class has been deprecated and replaced by the <A HREF="../../../org/apache/log4j/Logger.html" title="class in org.apache.log4j"><CODE>Logger</CODE></A> <em>subclass</em></b></font>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Level.html#org.apache.log4j.spi"><B>Level</B></A></B> <BR> Defines the minimum set of levels recognized by the system, that is <code>OFF</code>, <code>FATAL</code>, <code>ERROR</code>, <code>WARN</code>, <code>INFO</code, <code>DEBUG</code> and <code>ALL</code>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Logger.html#org.apache.log4j.spi"><B>Logger</B></A></B> <BR> This is the central class in the log4j package.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Priority.html#org.apache.log4j.spi"><B>Priority</B></A></B> <BR> <font color="#AA4444">Refrain from using this class directly, use the <A HREF="../../../org/apache/log4j/Level.html" title="class in org.apache.log4j"><CODE>Level</CODE></A> class instead</font>.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.varia"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/varia/package-summary.html">org.apache.log4j.varia</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.varia"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/AppenderSkeleton.html#org.apache.log4j.varia"><B>AppenderSkeleton</B></A></B> <BR> Abstract superclass of the other appenders in the package.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/FileAppender.html#org.apache.log4j.varia"><B>FileAppender</B></A></B> <BR> FileAppender appends log events to a file.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Level.html#org.apache.log4j.varia"><B>Level</B></A></B> <BR> Defines the minimum set of levels recognized by the system, that is <code>OFF</code>, <code>FATAL</code>, <code>ERROR</code>, <code>WARN</code>, <code>INFO</code, <code>DEBUG</code> and <code>ALL</code>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Logger.html#org.apache.log4j.varia"><B>Logger</B></A></B> <BR> This is the central class in the log4j package.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/RollingFileAppender.html#org.apache.log4j.varia"><B>RollingFileAppender</B></A></B> <BR> RollingFileAppender extends FileAppender to backup the log files when they reach a certain size.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/WriterAppender.html#org.apache.log4j.varia"><B>WriterAppender</B></A></B> <BR> WriterAppender appends log events to a <A HREF="/usr/share/javadoc/java/java/io/Writer.html?is-external=true" title="class or interface in java.io"><CODE>Writer</CODE></A> or an <A HREF="/usr/share/javadoc/java/java/io/OutputStream.html?is-external=true" title="class or interface in java.io"><CODE>OutputStream</CODE></A> depending on the user's choice.</TD> </TR> </TABLE> <P> <A NAME="org.apache.log4j.xml"><!-- --></A> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> Classes in <A HREF="../../../org/apache/log4j/package-summary.html">org.apache.log4j</A> used by <A HREF="../../../org/apache/log4j/xml/package-summary.html">org.apache.log4j.xml</A></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Appender.html#org.apache.log4j.xml"><B>Appender</B></A></B> <BR> Implement this interface for your own strategies for outputting log statements.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Layout.html#org.apache.log4j.xml"><B>Layout</B></A></B> <BR> Extend this abstract class to create your own log layout format.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD><B><A HREF="../../../org/apache/log4j/class-use/Logger.html#org.apache.log4j.xml"><B>Logger</B></A></B> <BR> This is the central class in the log4j package.</TD> </TR> </TABLE> <P> <HR> <!-- ======= START OF BOTTOM NAVBAR ====== --> <A NAME="navbar_bottom"><!-- --></A> <A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" 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