Starting JAR from java code

[kiel44]

Hi,
i have one question.
I have two jar files. First is main program, second is a update program.
update jar run as first , check main program and download upadets. After
that he suppose to run jar with main program and close. But I don't know how
to do it. Could somebody write me how to start jar file form java code? In
internet i found only how to start exe files .

 

[Remi Koutcherawy]

I only found 3 ways to start a jar from java :
- Using reflection
http://www-sor.inria.fr/~dedieu/java/SplashScreen.java
- Using a ClassLoader
http://cvs.sourceforge.net/viewcvs..../src/sf/eclipse/javacc/JarLoader.java?rev=1.1
- Using Runtime.exec
http://cvs.sourceforge.net/viewcvs....rc/sf/eclipse/javacc/JarLauncher.java?rev=1.1

Hope this helps.
Rémi

kiel44 a écrit :

 

[Roedy Green]

I have two jar files. First is main program, second is a update program.
update jar run as first , check main program and download upadets. After
that he suppose to run jar with main program and close. But I don't know how
to do it. Could somebody write me how to start jar file form java code? In
internet i found only how to start exe files .

if you are doing an Applet, all you have to do is call a method in a
class in the other jar possibly main, so long as the jar is mentioned
in the archive tag or the jar Class-Path manifest it will find it. You
might want to use the Jar index feature to speed this up.
see http://mindprod.com/jgloss/jar.html


You don't need to fire up a whole new JVM for it most of the time. If
you do, then see http://mindprod.com/jgloss/exec.html

 

[Roedy Green]

- Using reflection
http://www-sor.inria.fr/~dedieu/java/SplashScreen.java
- Using a ClassLoader
http://cvs.sourceforge.net/viewcvs..../src/sf/eclipse/javacc/JarLoader.java?rev=1.1
- Using Runtime.exec
http://cvs.sourceforge.net/viewcvs....rc/sf/eclipse/javacc/JarLauncher.java?rev=1.1

but if you know the same of the class you want, and the jar is on the
classpath, there is nothing special to do. You just execute a method
of some class in the jar usually main.

 

[Tor Iver Wilhelmsen]

but if you know the same of the class you want, and the jar is on the
classpath, there is nothing special to do. You just execute a method
of some class in the jar usually main.

But do install a SecurityManager first to avoid having that second
"main()" assume it runs standalone and call System.exit().

 

[Andrew Thompson]

But do install a SecurityManager first to avoid having that second
"main()" assume it runs standalone and call System.exit().

Viz.
<http://groups.google.com/[email protected]>