Change the Java Compiler of the Eclipse(Luna) from 1.7 to 1.6, then the Java file runs fine but in the time to run the build.xml, the following error is occurred...
BUILD FAILED build.xml:47: java.lang.UnsupportedClassVersionError: com/sun/tools/javac/Main : Unsupported major.minor version 51.0
build.xml file is...
<property environment="env"/>
<property name="ECLIPSE_HOME" value="../../Softwares/eclipse-jee-luna-R-win32-x86_64/eclipse/"/>
<property name="junit.output.dir" value="junit"/>
<property name="debuglevel" value="source,lines,vars"/>
<property name="target" value="1.6"/>
<property name="source" value="1.6"/>
<path id="Referenced Libraries.userclasspath"/> ... ... ... <target description="Build all projects which reference this project. Useful to propagate changes." name="build-refprojects"/>
<target description="copy Eclipse compiler jars to ant lib directory" name="init-eclipse-compiler">
<copy todir="${ant.library.dir}">
<fileset dir="${ECLIPSE_HOME}/plugins" includes="org.eclipse.jdt.core_*.jar"/>
</copy>
<unzip dest="${ant.library.dir}">
<patternset includes="jdtCompilerAdapter.jar"/>
<fileset dir="${ECLIPSE_HOME}/plugins" includes="org.eclipse.jdt.core_*.jar"/>
</unzip>
</target>
<target description="compile project with Eclipse compiler" name="build-eclipse-compiler">
<property name="build.compiler" value="org.eclipse.jdt.core.JDTCompilerAdapter"/>
<antcall target="build"/>
</target>
<target name="ExampleTest">
<mkdir dir="${junit.output.dir}"/>
<junit fork="yes" printsummary="withOutAndErr">
<formatter type="xml"/>
<test name="org.idmunit.ExampleTest" todir="${junit.output.dir}"/>
<classpath refid="IdMUnitTests.classpath"/>
</junit>
</target>
<target name="junitreport">
<junitreport todir="${junit.output.dir}">
<fileset dir="${junit.output.dir}">
<include name="TEST-*.xml"/>
</fileset>
<report format="frames" todir="${junit.output.dir}"/>
</junitreport>
</target>
