title: install and switch between java 7 and java 8 in windows
body: <p>I am on widows and also using eclipse. Currently I am using java 7. Now I want to use java 8. but i cannot uninstall java 7 as some of my old projects are working in java 7. </p>
  
  <p>So how can I install both java version at same time and switch between these versions.</p>
  
  <p>I want only some particular projects will use java 8.</p>