Find Java packages or jars containing a class

"Find Class In Jars" or "Find package in Jars" is a common need for people using Java and Java related products especially after getting the infamous java.lang.NoClassDefFoundError

This POB recipe named findClassInJars.sh can be run locally or remotely to inspect all jars recursively starting at a parent directory, hopefully finding which jar contains the class that is not being loaded.

Here is an example of the script in action:

$ ~/eclipse-workspace-test/recipes/common/tools/findClassInJars.sh ~/Downloads/TOS-All-r67267-V4.2.3 javax/mail/internet/MimeUtility


---------------------------------------------
file: /Users/nestor/Downloads/TOS-All-r67267-V4.2.3//configuration/org.eclipse.osgi/bundles/2193/1/.cp/components/tESBConsumer/geronimo-javamail_1.4_spec-1.7.1.jar
---------------------------------------------
16881 Fri Jun 11 06:45:40 EDT 2010 javax/mail/internet/MimeUtility.class

---------------------------------------------
file: /Users/nestor/Downloads/TOS-All-r67267-V4.2.3//lib/java/geronimo-javamail_1.4_spec-1.7.1.jar
---------------------------------------------
16881 Fri Jun 11 06:45:40 EDT 2010 javax/mail/internet/MimeUtility.class

---------------------------------------------
file: /Users/nestor/Downloads/TOS-All-r67267-V4.2.3//lib/java/mail-1.4.jar
---------------------------------------------
455 Fri Apr 28 12:28:34 EDT 2006 javax/mail/internet/MimeUtility$1NullInputStream.class 18168 Fri Apr 28 12:28:34 EDT 2006 javax/mail/internet/MimeUtility.class

---------------------------------------------
file: /Users/nestor/Downloads/TOS-All-r67267-V4.2.3//lib/java/mail.jar
---------------------------------------------
18817 Fri Jan 14 15:37:10 EST 2011 javax/mail/internet/MimeUtility.class 455 Fri Jan 14 15:37:10 EST 2011 javax/mail/internet/MimeUtility$1NullInputStream.class

---------------------------------------------
file: /Users/nestor/Downloads/TOS-All-r67267-V4.2.3//plugins/org.talend.designer.components.localprovider_4.2.3.r67267/components/ext/tesb/tESBConsumer/geronimo-javamail_1.4_spec-1.7.1.jar
---------------------------------------------
16881 Fri Jun 11 06:45:40 EDT 2010 javax/mail/internet/MimeUtility.class

---------------------------------------------
file: /Users/nestor/Downloads/TOS-All-r67267-V4.2.3//plugins/org.talend.designer.components.localprovider_4.2.3.r67267/components/tMicrosoftCrmInput/mail-1.4.jar
---------------------------------------------
455 Fri Apr 28 12:28:34 EDT 2006 javax/mail/internet/MimeUtility$1NullInputStream.class 18168 Fri Apr 28 12:28:34 EDT 2006 javax/mail/internet/MimeUtility.class

---------------------------------------------
file: /Users/nestor/Downloads/TOS-All-r67267-V4.2.3//plugins/org.talend.designer.components.localprovider_4.2.3.r67267/components/tWebServiceInput/mail.jar
---------------------------------------------
18817 Fri Jan 14 15:37:10 EST 2011 javax/mail/internet/MimeUtility.class 455 Fri Jan 14 15:37:10 EST 2011 javax/mail/internet/MimeUtility$1NullInputStream.class

---------------------------------------------
file: /Users/nestor/Downloads/TOS-All-r67267-V4.2.3//plugins/org.talend.libraries.apache.axis2_4.2.3.r67267/lib/mail-1.4.jar
---------------------------------------------
455 Fri Apr 28 12:28:34 EDT 2006 javax/mail/internet/MimeUtility$1NullInputStream.class 18168 Fri Apr 28 12:28:34 EDT 2006 javax/mail/internet/MimeUtility.class