Re: How to check if all *.jars in my CLASSPATH really exists? Automatic check (not manual) possible?

From:

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>

Newsgroups:

comp.lang.java.programmer

Date:

Sat, 26 Apr 2008 11:47:46 -0400

Message-ID:

<48134e9f$0$90271$14726298@news.sunsite.dk>

Jason Stacy wrote:

Assume I have a long, long CLASSPATH containing approx 20 (or more) *.jar archives.
Is there a way to AUTOMATICALLY check if all mentioned *.jar files really exist?

I could imagine a command (or even java class) which checks this from command line:

java check_cp &CLASSPATH%

or similar

1) Some code for inspiration:

import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLDecoder;

public class CP {
     public static void main(String[] args) throws Exception {
         String cp = System.getenv("CLASSPATH");
         for(String p : cp.split(";")) {
             System.out.println(p + " " + (new File(p)).exists());
         }
         ClassLoader cl = CP.class.getClassLoader();
         if(cl instanceof URLClassLoader) {
             for(URL url : ((URLClassLoader)cl).getURLs()) {
                 System.out.println(url + " " + (new
File(URLDecoder.decode(url.getPath(), "ISO-8859-1"))).exists());
             }
         }
     }

}

2) Don't use CLASSPATH env variabel !

Arne