Building with Ant in Eclipse - javac not recognizing lambda expression (Java 1.8) -

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i trying build existing project using ant in eclipse. problem javac not recognize use of lambda expression (error: illegal start of expression) in 1 of files, , build fails during compile phase of ant.

within eclipse, i've ensured java compiler compliance level set 1.8 , java 8 in java build path.

i've ensured path, java_home, , jre_home point java 8 directory (in path points /bin directory).

for giggles, compile section of build.xml file is:

<target name="compile" depends="setup">     <javac destdir="${base}/${build.dir}"            srcdir="${base}/${src.dir}"            deprecation="true"            verbose="false"            includeantruntime="false">            <classpath refid="libs" />     </javac> </target>

i'm not sure next. i've resorted restarting eclipse hoping magic happen. suggestions or welcome! in advance.

adding <echo> java version: ${ant.java.version}</echo> build.xml revealed ant still running java 1.7.

i added directory location of java 8 javac , modified javac task executable , fork attributes use it:

<property name="javac1.8" location="/path/to/java8/bin/javac" /> <target name="compile" depends="setup">     <javac executable="{$javac1.8}" fork="yes"            destdir="${base}/${build.dir}"            srcdir="${base}/${src.dir}"            deprecation="true"            verbose="false"            includeantruntime="false">            <classpath refid="libs" />     </javac> </target>

thanks comments @jim garrison, @wero, , @greg-449. powers combined lead me answer.


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