use different jdk for build file

i have an environment that i use to build applications and a new requirement has been developed for this environment to use two different jdks for building different versions of the code, the old branch uses jdk 1.5 and the new branch uses jdk 1.6 i found that it is easy enough to tell the jav

specify in build script which ant lib to use

I m not sure how to do this - how do i tell ant where to find it lib files when it is running itself - cant always be sure the environment the script is used in has the right version of ant -- View this message in context: http://www.nabble.com/specify-in-build-script-which-ant-lib-to-use-tf336

access and change values in a propertyset

i need to access all change the values in a propertyset - no idea how to manipulate a propertyset outside of echo properties. I need to get the values - perform math on the values and expand those proprties to a configuration file- I am deploying configuration files to multiple instances and need

load name value pairs in file as tokens

I have a setup file that contains 80 or so name value pairs separated by an "=" sign. I want to use these name value pairs to replace similarly name keys in a number of other files needed to deploy web applications to different environments. Is it possible to load these name value pairs from a