Running java in linux script

Question

Suppose to package all necessary *.class in example.jar in following way,
bin.start.class
business.bus.class
and the class file that contain main is bin.start.class.
There is no problem to run following under linux shell prompt. java VM is under PATH searching path. i.e.
$java -classpath example.jar bin.start
However, there is some problem to run a script which contains 'java -classpath example.jar bin.start' under linux shell prompt.
May I have any clue to identify this problem?
Thanks in advance.

Answer 1

For case 1: Does any case work? When I see "[un]able to locate the main method" then I think that that the class was found but that the main method is not declared properly.
Of course, main must be declared with exactly these keywords:
static public void main( String arg[]) {
...For case 2: you still have some kind of classpath problem.
If your script really has the line
java -classpath example.jar bin.start
then I still think your current working directory at the time that this line is run not that same directory as where the jar file is.
If you have JAVA_HOME defined, you might want to try:
pwd
$JAVA_HOME/bin/java -classpath example.jar bin.start
Another suggestion: If your $PATH variable is long, try to shorten it to a short list of directories. You can test with just /bin:/usr/bin .
Also, is your shell Bash or C-shell? Is your script Bourne shell (/bin/sh) or Bourne?