title: JRE 281 cannot run OpenJDK compiled jar
body: <p>I have compiled .jar using OpenJDK 13 which cannot be run by most recent JRE (281). is it okay?
  (OpenJDK can run this .jar, but ordinary people won't use it)</p>
  <p>This is the output:</p>
  <pre><code>$ ./java -jar HelloWorld.jar
  Error: A JNI error has occurred, please check your installation and try again
  Exception in thread &quot;main&quot; java.lang.UnsupportedClassVersionError: HelloWorld has been compiled by a more recent version of the Java Runtime (class file version 57.0), this version of the Java Runtime only recognizes class file versions up to 52.0
          at java.lang.ClassLoader.defineClass1(Native Method)
          at java.lang.ClassLoader.defineClass(Unknown Source)
          at java.security.SecureClassLoader.defineClass(Unknown Source)
          at java.net.URLClassLoader.defineClass(Unknown Source)
          at java.net.URLClassLoader.access$100(Unknown Source)
          at java.net.URLClassLoader$1.run(Unknown Source)
          at java.net.URLClassLoader$1.run(Unknown Source)
          at java.security.AccessController.doPrivileged(Native Method)
          at java.net.URLClassLoader.findClass(Unknown Source)
          at java.lang.ClassLoader.loadClass(Unknown Source)
          at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
          at java.lang.ClassLoader.loadClass(Unknown Source)
          at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
  </code></pre>