java - Why is Ant giving me a Unsupported major.minor version error

Thursday, 24 March 2016

I'm running this target in Ant.

    description="compile the source " >

It's giving me this error.


C:\Users\..\workspace\..\build.xml:21: java.lang.UnsupportedClassVersionError: 
    com/sun/tools/javac/Main : Unsupported major.minor version 51.0

Here are the versions:

Apache Ant(TM) version 1.8.2

JDK version is JDK 1.7.0

Here's my Compiler settings in Eclipse.

enter image description here

Please help me resolve it.

Answer

The runtime jre was set to jre 6 instead of jre 7 in the build configuration window.

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