Setting classpath when using Runtime.exec()

[Dermot Curley]

I'm trying to compile some java files using:
Runtime rtn = Runtime.getRuntime();
Process pr = rtn.exec(anArrayOfFiles);
The first element in the array anArrayOfFiles is = "javac", the rest being the location of the files. When I try to set the classpath in the above string the new process just hangs. eg "javac -classpath c:\\myClasses". Is there a special way to format this string? or is it just not allowed?

[Rene Larsen]

You could just make a script file and then call this from 'exec()'
Inside this file you setup the CLASSPATH and you compiles the source.
e.g. compile.cmd

set CLASSPATH=.;..\..\..\..\common\lib\servlet.jar;..\lib\classes12.jar;..\lib\log4j.jar
del /q ..\lib\PdkGis_src.jar
javac java/sql/*.java
javac java/lang/*.java
jar cvf ..\lib\PdkGis_src.jar java\sql\*.class java\lang\*.class
del /s /q *.class

From your code:

Runtime.getRuntime().exec("cmd /k start C:\\java\\source\\compile.cmd");

/Rene
[ July 03, 2002: Message edited by: Rene Larsen ]

[Cindy Glass]

Try reading this:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

[Cindy Glass]

Oh yeah - dermotc
Please change your name to be compliant with JavaRanch's naming policy.
Your displayed name should be 2 separate names with more than 1 letter each. We really would prefer that you use your REAL name.
Thanks,
Cindy

[Dermot Curley]

Thanks Cindy that article set me straight on Runtime.exec(). Sorry about the name, too eger to get an answer to my question!