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<h1>Description / Feature</h1><p>Get code coverage for Java project with <a class="external-link" href="http://www.eclemma.org/jacoco/index.html" rel="nofollow">JaCoCo</a> (an open source and robust Java code coverage tool, developed by the authors of EclEmma). <span style="font-size: 10.0pt;line-height: 13.0pt;">For more information, see: </span><a class="external-link" href="http://www.sonarsource.org/pick-your-code-coverage-tool-in-sonar-2-2/" rel="nofollow" style="font-size: 10.0pt;line-height: 13.0pt;">Comparison of Emma, Clover, Cobertura and JaCoCo</a><span style="font-size: 10.0pt;line-height: 13.0pt;">.</span></p><table class="confluenceTable"><tbody><tr><th class="confluenceTh"><p><strong>JaCoCo Plugin</strong></p></th><th class="nohighlight confluenceTh" colspan="1" style="text-align: right;">1.1<strong><br /></strong></th><th class="nohighlight confluenceTh" colspan="1" style="text-align: right;">1.2</th></tr><tr><td class="highlight confluenceTd"><p>JaCoCo</p></td><td colspan="1" class="confluenceTd">0.5.10</td><td colspan="1" class="confluenceTd">0.6.2</td></tr></tbody></table><h1>Installation</h1><ol><li>Install the JaCoCo plugin through the <a href="http://docs.codehaus.org/display/SONAR/Update+Center">Update Center</a> (since Sonar 3.5) or download it into the SONAR_HOME/extensions/plugins directory from the <a class="confluence-link" href="/display/SONAR/Java+Ecosystem" data-linked-resource-id="230396085" data-linked-resource-type="page" data-linked-resource-default-alias="Java Ecosystem" data-base-url="http://docs.codehaus.org">Java Ecosystem page</a>.</li><li>Restart the Sonar server</li></ol><h1>Usage</h1><p>See <a class="confluence-link" href="/display/SONAR/Code+Coverage+by+Unit+Tests+for+Java+Project" data-linked-resource-id="230397062" data-linked-resource-type="page" data-linked-resource-default-alias="Code Coverage by Unit Tests for Java Project" data-base-url="http://docs.codehaus.org">Code Coverage by Unit Tests for Java Project tutorial</a>.</p><h1><span style="color: rgb(0,0,0);">Known Limitations</span></h1><ul><li>Some libraries complain on classes, which were instrumented by JaCoCo, so exclusions must be set:<br /><ul><li>Javassist (e.g. when Hibernate used) - &quot;*_javassist_<strong><em>*</em></strong>&quot;</li><li>Drools - &quot;org.drools.*&quot;</li></ul></li><li>The exact number of line hits is not available, because JaCoCo reports only status of line (no code, not covered, partly covered, fully covered) - see <a class="external-link" href="http://www.eclemma.org/jacoco/trunk/doc/counters.html" rel="nofollow">JaCoCo Coverage Counters</a>.</li></ul>