return code from a java program

[Maalti Iyer]

Hi,

I've a Unix shell script that calls multiple (4) java programs. It should call a java program in the sequence only if the provious program was successful.(ie program 2 should be called only if program 1 was successful).

can someone help me?

Thanks
Maalti.

[Tom Blough]

Use System.exit() in your Java programs to return an error level to the UNIX shell.

[Scott Dunbar]

To add to what Tom said, in Unix it is traditional to exit with a zero to indicate success. Any other value indicates some sort of error occured. In some programs the exit value tells you which error occured.

[Chetan Parekh]

Originally posted by Tom Blough:
Use System.exit() in your Java programs to return an error level to the UNIX shell.

If you do System.exit(-1);, it will kill your App Server
[ October 28, 2005: Message edited by: Chetan Parekh ]

[Stefan Wagner]

After implementing the 'System.exit (status);' -stuff, you combine the commands like this:

java P1 && java P2 && java P3 && java P4 

to execute P2 only if P1 succeeded, and so on.