title: Unsupported major.minor version 52.0 in ubuntu
body: <p>I am using <code>jdk1.8.0_25</code>, and when I check the version of Java with the following command:</p>
  
  <pre><code>java -version
  </code></pre>
  
  <p>it outputs the following</p>
  
  <pre class="lang-none prettyprint-override"><code>java version "1.7.0_65"
  OpenJDK Runtime Environment (IcedTea 2.5.3) (7u71-2.5.3-0ubuntu0.14.04.1)
  OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)
  </code></pre>
  
  <p>Please solve my problem.</p>