title: Call Java Webstart 1.6 out of java 1.7 application
body: <p>I have a bunch of webstart applications, which are programmed and tested under Java 1.6.0_11. For being sure that these applications run as intended, I start them using the javaws.exe of an installed JRE with version 1.6.0_11. This version is only used for starting these applications. The "standard" Java used on my System is always the newest version, in order to get all security updates (etc.).</p>
  
  <p>With version 1.7.0_25 I am not able to call the javaws.exe from my 1.6.0_11 installation anymore. My applications simply do not start. It seems that the 1.7.0_25 webstart does not allow run applications which require an older version. So my problem is: How can I start my applications with the 1.6.0_11 java webstart?</p>
  
  <p>My approach was to build a launcher application, which checks the required java version and calls the appropiate webstart via <code>Runtime.exec()</code>. But can I be sure that the called javaws.exe does not use any variables or resources of the installed 1.7.0_25 JRE? It is crucial to me to guarantee the flawless execution of these applications.</p>