Build failed with error "Source option 6 is no longer supported. Use 7 or later."

[Suseendran-angamuthu]

[ivy:cachepath] DEPRECATED: 'ivy.conf.file' is deprecated, use 'ivy.settings.file' instead
[ivy:cachepath] :: loading settings :: file = /tmp/aws-elasticache-cluster-client-memcached-for-java/ivy/ivysettings.xml

compile:
[mkdir] Created dir: /tmp/aws-elasticache-cluster-client-memcached-for-java/build/classes
[javac] Compiling 224 source files to /tmp/aws-elasticache-cluster-client-memcached-for-java/build/classes
[javac] warning: [options] bootstrap class path not set in conjunction with -source 6
[javac] error: Source option 6 is no longer supported. Use 7 or later.
[javac] error: Target option 6 is no longer supported. Use 7 or later.

BUILD FAILED
/tmp/aws-elasticache-cluster-client-memcached-for-java/build.xml:511: Compile failed; see the compiler error output for details.