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A: You can check for programs added to the host system's path environment variable through the java.lang.System class' getenv() method, or getenv(String), provided the application has the necessary security permission. The getenv() method returns a map of all environment variables in the current user session, getenv(String) returns the String value of the variable named by the argument, if it exists. You can extract all the paths in the path environment variable using a StringTokenizer using the system specific path separator as the delimiter, as below.
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How can I get the path to an installed program?