title: Eclipse cannot start in Ubuntu
body: <p>Eclipse cannot start in Ubuntu and gives an error log - <code>java.lang classNotFoundException</code></p>
  
  <pre><code>!SESSION Sat Nov 17 14:47:28 EAT 2012 ------------------------------------------
  !ENTRY org.eclipse.equinox.launcher 4 0 2012-11-17 14:47:28.694
  !MESSAGE Exception launching the Eclipse Platform:
  !STACK
  java.lang.ClassNotFoundException: org.eclipse.core.runtime.adaptor.EclipseStarter
      at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
      at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
  </code></pre>