Note: the current build does not create a .jre bundle, but this page describes the intention for what .jdk and .jre bundles should do

.jdk bundle

• For developers only
• Installed in /Library/Java/JavaVirtualMachines
• Used by the /usr/bin/j* tools
• May only be embedded in Java IDEs, not appropriate for normal .apps

.jre bundle

• For embedding in Java-based .apps and plugins
• Should not be "installed" on the system
• Can be further stripped down if embedding app doesn't need
  • unused classes in rt.jar
  • unused HotSpots (client vs. server)
  • unused architectures (lipo out i386 or x86_64)
  • unused native libraries