RE: RPG - Java Call

["Larry" <Larry_Ducie@xxxxxxxxxxx>]

Hi Sudha,
 
<snip>
I made some progress but I am back to class not found error, when I have
the CLASSPATH defined.  To explain further, I have the jar in '/junk'.
In classpath, I have CLASSPATH=.:/QIBM\... :/junk/Ostermiller_1.jar'.
(Is it case sensitive perhaps? I know the environment variable is case
sensitive.) 
The class Browser is in com.Ostermiller.util package. In qsh, I go to
'/junk' and give the java command and get the error.  Also, Can I get
more information on the error somehow?
..
java com.Ostermiller.util.Browser.displayURL  <http://www.yahoo.com/>
http://www.yahoo.com
</snip>
 
>From your java command, it would "appear" that you are trying to call the
displayURL static method of the Browser class. You can't do this.
 
Even though the displayURL method is static, and therefore doesn't need a
Browser object to be instanciated, you can't just call it from a command
line. The only method that can be called via the java command is the public
static void main method. This method takes a space-delimited String array as
an argument.
 
So, if you use the command: java com.Ostermiller.util.Browser
http://www.yahoo.com. This will attempt to call public static void
Browser.main(String[] args). In this case, your passing a single String. If
you use the command you're using: java
com.Ostermiller.util.Browser.displayURL  <http://www.yahoo.com/>
http://www.yahoo.com. This will attempt to call <access modifier> <return
type> Browser.displayURL(String argv). This is not allowed.
 
(Also, I would suggets ostermiller - not Ostermiller. By convention, only
class names begin with a Capital letter.)
 
Now, inside your Ostermiller_1.jar file you MUST have a directory structure
that matches your package name - the first line of your java source should
have: package com.ostermiller.util;. You must then include the
Ostermiller_1.jar file in your classpath. It's the classpath plus the
package definition that is used to locate the class object. Thus, the java
class loader would look for your Browser class in
/junk/com/ostermiller/util. If you haven't got your class in directory
com/ostermiller/util WITHIN your jar file then the class loader wont find
your class.
 
HTH, and good luck.
 
Larry Ducie