Build Failure

I followed these instructions from the Getting Started with the JAVA SDK https://aws.amazon.com/developers/getting-started/java/:

Download the Sample Project
`git clone https://github.com/awslabs/aws-java-sample.git`

From the aws-java-sample directory, run:
`mvn clean compile exec:java`

I however get the following build error:
```

[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to C:\Users\jamisch\Documents\GitHub\aws-java-sample\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] Source option 5 is no longer supported. Use 6 or later.
[ERROR] Target option 1.5 is no longer supported. Use 1.6 or later.
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 19.220 s
[INFO] Finished at: 2018-11-01T17:36:06-07:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project aws-java-sample: Co
[ERROR] Source option 5 is no longer supported. Use 6 or later.
[ERROR] Target option 1.5 is no longer supported. Use 1.6 or later.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
```

Start by running `mvn clean compile exec:java` in the cloned aws-java-sample project and inspect the Maven compiler configuration responsible for the source and target versions. Done means the sample compiles and the command completes without the reported Java build failure.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.