question: void extract ( InputStream in , String files [ ] ) throws IOException { ZipInputStream zis = new ZipInputStream ( in ) ; ZipEntry e ; Set < ZipEntry > dirs = newDirSet ( ) ; while ( ( e = zis . getNextEntry ( ) ) != null ) { if ( files == null ) { dirs . add ( extractFile ( zis , e ) ) ; } else { String name = e . getName ( ) ; for ( String file : files ) { if ( name . startsWith ( file ) ) { dirs . add ( extractFile ( zis , e ) ) ; break ; } } } } updateLastModifiedTime ( dirs ) ; }
target:  Extracts specified entries from JAR file.