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POjar and cannot find symbol for method (but other class methods are found)?
 

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  1. POjar and cannot find symbol for method (but other class methods are found)?
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    <p>I really have problem with this one. </p> <p>So I have a jar with a class for handling a database connection. In that class I have put several methods. Out of this class I have created a jar using Ant. </p> <p>Sometime yesterday I suddenly could not access the latest method in that db class anymore. I get:</p> <pre><code>compile: [javac] C:\cygwin\home\user\Dev\Java\avc_alarm\build.xml:22: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds [javac] Compiling 1 source file to C:\cygwin\home\user\Dev\Java\avc_alarm\build [javac] C:\cygwin\home\user\Dev\Java\avc_alarm\src\se\gefa\avc_alarm\Main.java:9: error: cannot find symbol [javac] symbolAliases = db.getAlarmSymbolAlias(); [javac] ^ [javac] symbol: method getAlarmSymbolAlias() [javac] location: variable db of type AvcDb [javac] 1 error </code></pre> <p>Code that tries to use this class method:</p> <pre><code>package se.gefa.avc_alarm; import se.gefa.avc_db.AvcDb; import java.util.ArrayList; public class Main { static AvcDb db = new AvcDb(); static ArrayList&lt;String&gt; symbolAliases; public static void main(String args[]) throws Exception { db.setupConnection("jdbc:h2:tcp://localhost/C:/XXXX/xyz", "sa", ""); symbolAliases = db.getAlarmSymbolAlias(); } } </code></pre> <p>And the db class (which goes into a jar):</p> <pre><code>package se.gefa.avc_db; import java.sql.*; import java.util.ArrayList; public class AvcDb { // --- // Other methods that DO work // --- // The one that DO NOT work public ArrayList&lt;String&gt; getAlarmSymbolAlias() throws Exception { String query = "SELECT * FROM Alarm"; Statement statement = conn.createStatement(); ResultSet resultSet = statement.executeQuery(query); ArrayList&lt;String&gt; symbols = new ArrayList&lt;String&gt;(); while (resultSet.next()) symbols.add(resultSet.getString("symbol_alias")); return symbols; } } </code></pre> <p>I'm using java 7, Ant 1.8.3 and Vim. When opening the db jar in IntelliJ I can see that the getAlarmSymbolAlias method exists. And as I said, I could call any other of the methods for the db class except any method added yesterday. A simple test in IntelliJ and it seems to work (but I don't want to learn a new Editor when I got all other set up in Vim, CL and Ant.</p> <p><strong>Edit</strong> Ant script:</p> <pre><code>&lt;project name="AvcAlarm" default="dist" basedir="."&gt; &lt;description&gt; Alarm program. &lt;/description&gt; &lt;property name="src" location="src"/&gt; &lt;property name="build" location="build"/&gt; &lt;property name="dist" location="dist"/&gt; &lt;property name="lib" location="lib"/&gt; &lt;path id="classpath"&gt; &lt;fileset dir="${lib}" includes="**/*.jar"/&gt; &lt;/path&gt; &lt;target name="init"&gt; &lt;tstamp/&gt; &lt;mkdir dir="${build}"/&gt; &lt;mkdir dir="${dist}"/&gt; &lt;/target&gt; &lt;target name="compile" depends="init" description="compile the source " &gt; &lt;javac srcdir="${src}" destdir="${build}" classpathref="classpath"/&gt; &lt;/target&gt; &lt;target name="dist" depends="compile" description="generate the distribution" &gt; &lt;jar destfile="${dist}/gefa_alarm.jar" basedir="${build}"&gt; &lt;zipgroupfileset dir="lib" includes="*.jar" /&gt; &lt;manifest&gt; &lt;attribute name="Main-Class" value="se/gefa/avc_alarm/Main"/&gt; &lt;/manifest&gt; &lt;/jar&gt; &lt;/target&gt; &lt;target name="clean" description="clean up" &gt; &lt;delete dir="${build}"/&gt; &lt;delete dir="${dist}"/&gt; &lt;/target&gt; &lt;/project&gt; </code></pre>
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    1. COCheck that the build path is current (includes the latest sources). You seem to be having a build-path related warning message there.
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    2. COShow us how you build your app (`.project` Eclipse file, or `build.xml` Ant file, or compilation command line), your classpath must be wrong.
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    3. COmaybe you have an older version of AvcDb in the jar that is missing getAlarmSymbolAlias().
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      1. USoers
 

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