question: private void removeJarFiles ( final String dirPath , final String [ ] jarNames ) throws IOException { if ( jarNames != null ) { for ( int i = 0 ; i < jarNames . length ; i ++ ) { File jarFile = new File ( FilenameUtils . concat ( dirPath , jarNames [ i ] ) ) ; if ( jarFile . exists ( ) ) { FileUtils . forceDelete ( jarFile ) ; } } } else { File dir = new File ( dirPath ) ; String [ ] jarFileNames = dir . list ( jarFileFilter ) ; if ( jarFileNames . length != 0 ) { File jarFileToBeDeleted ; for ( String jarFileName : jarFileNames ) { String fullPath = FilenameUtils . concat ( dirPath , jarFileName ) ; jarFileToBeDeleted = new File ( fullPath ) ; FileUtils . forceDelete ( jarFileToBeDeleted ) ; } } } }
target:  Removes the jar files from the given directory