title: Why is Maven trying to compile my code as -source 1.3?
body: <p>I get this error <code>mvn -e package</code> in Ubuntu 12.04:</p>
  
  <pre><code>[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project HadoopSkeleton: Compilation failure: Compilation failure:
  [ERROR] /home/jesvin/dev/hadoop/HadoopMahoutSkeleton-master/src/main/java/HadoopSkeleton/App.java:[22,8] error: generics are not supported in -source 1.3
  [ERROR] 
  [ERROR] (use -source 5 or higher to enable generics)
  [ERROR] /home/jesvin/dev/hadoop/HadoopMahoutSkeleton-master/src/main/java/HadoopSkeleton/App.java:[53,28] error: for-each loops are not supported in -source 1.3
  [ERROR] -&gt; [Help 1]
  org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project HadoopSkeleton: Compilation failure
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
      at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
      at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
      at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
      at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
      at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
      at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
      at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
      at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
      at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)
      at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
      at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
      at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
      at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
  Caused by: org.apache.maven.plugin.CompilationFailureException: Compilation failure
      at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:516)
      at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:114)
      at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
      ... 19 more
  [ERROR] 
  [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
  </code></pre>
  
  <p>So I guess Maven is forced to compile against an older version of Java. But <strong>why</strong> is it doing so? I just want a maven configuration that builds Mahout jars.</p>
  
  <pre><code>&lt;dependencies&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;junit&lt;/groupId&gt;
          &lt;artifactId&gt;junit&lt;/artifactId&gt;
          &lt;version&gt;4.11&lt;/version&gt;
          &lt;scope&gt;test&lt;/scope&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;org.apache.hadoop&lt;/groupId&gt;
          &lt;artifactId&gt;hadoop-core&lt;/artifactId&gt;
          &lt;version&gt;1.0.4&lt;/version&gt;
          &lt;!-- or whatever version --&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;org.apache.mahout&lt;/groupId&gt;
          &lt;artifactId&gt;mahout-core&lt;/artifactId&gt;
          &lt;version&gt;0.7&lt;/version&gt;
      &lt;/dependency&gt;
  &lt;/dependencies&gt;
  </code></pre>
  
  <p>I am trying to build by <a href="https://github.com/yeahiii/HadoopMahoutSkeleton/blob/master/pom.xml">https://github.com/yeahiii/HadoopMahoutSkeleton/blob/master/pom.xml</a></p>
  
  <pre><code>java version "1.7.0_21"
  Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
  Java HotSpot(TM) Server VM (build 23.21-b01, mixed mode)
  </code></pre>