Determine jar file of a class
We sometimes need to determine from which jar file some particular class comes from. Here I wrote a small method to find out the name of the jar file we are looking for : public static String getJarURL ( Class mclass ) { URL clsUrl = mclass. getResource ( mclass. getSimpleName ( ) + ".class" ) ; if ( clsUrl ! = null ) { try { URLConnection conn = clsUrl. openConnection ( ) ; if ( conn instanceof JarURLConnection ) { JarURLConnection connection = ( JarURLConnection ) conn ; return connection. getJarFileURL ( ) . toString ( ) ; } } catch ( IOException e ) { throw new RuntimeException ( e ) ; } } return null ; } public static void main ( String [ ] x ) { System . out . println ( getJarURL ( java. net . HttpURLConnection . class ) ) ; }...