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Tip of the Day
Language: Java
Expertise: Intermediate
Feb 13, 2002

Read NT Environment Variables from a Java Application


Start the JVM with the "-D" switch to pass properties to the application and read them with the System.getProperty() method.
  
SET myvar = Hello world
 Set myothervar = nothing
 java -Dmyvar="%myvar%" -Dmyothervar="%myothervar%" myClass

Then, in myClass:
 
 String myvar = System.getProperty("myvar");
 String myothervar = System.getProperty("myothervar");

If you don't know the name of the variable to be passed to the JVM, then there is no 100% Java way to retrieve them.
Ashish Gupta
 
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