If you are getting an error like:
~/aws-java-sample/src/main/java/com/amazonaws/samples/S3Sample.java:[94,31] error: for-each loops are not supported in -source 1.3
When trying to build the aws-java-sample from GitHub you can fix it by adding the maven compile source and target (see link). Something like:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
Fix submitted on GitHub by mvrueden.