execute java app from within java

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Petterson Mikael - 25 Oct 2006 11:46 GMT

Hi,

Is there another way of launching a java program, from within another
java program, than using:

Runtime r = Runtime.getRuntime();
Process p = r.exec("c:/javac/bin/java -classpath c:\\Michael Sample");

What I want to do is to check if I have infocenter ( part of Eclipse)
running if not then I need to fire up eclipse's infocenter using command
(this is from a shell script):

java -classpath
$ECLIPSE_HOME/plugins/org.eclipse.help.base_3.2.0.v20060601.jar
org.eclipse.help.standalone.Infocenter -command $1 -port
$INFOCENTER_PORT -eclipsehome $ECLIPSE_HOME -noexec -data $data -host
`hostname`

cheers,

//mikael

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Simon - 25 Oct 2006 14:03 GMT

Petterson Mikael schrieb:

> Hi,
>
[quoted text clipped - 3 lines]
> Runtime r = Runtime.getRuntime();
> Process p = r.exec("c:/javac/bin/java -classpath c:\\Michael Sample");

If it's on the classpath, just call (maybe in a separate Thread?)

Sample.main(new String[0]);

If it is not, use your own class loader to load the class from "C:\Michael" and
then call main(), possibly using reflection.
Note that when both programs are running in the same JVM they may of course
interfere by accessing static methods and fields etc.

(Don't know about Eclipse, though, but that doesn't seem to be relevant here.)

Cheers,
Simon

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execute java app from within java

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