Objective of this program is how to get compression method used to compress the entry using getMethod method of Java ZipEntry class.
import java.io.File; import java.io.IOException; import java.util.Enumeration; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; public class GetCompressionMethod { public static void main(String args[]) { try { /* To Open a zip file, use ZipFile(String fileName) constructor of the ZipFile class. This constructor throws IOException for any I/O error.*/ ZipFile zipFile = new ZipFile("D:/WebFiles.zip"); /* Get list of zip entries using entries method of ZipFile class */ Enumeration e = zipFile.entries(); System.out.println("File Name\t\t\t\tCompression Method"); System.out.println("---------------------------------"); while(e.hasMoreElements()) { ZipEntry entry = (ZipEntry)e.nextElement(); /* To get compression method used to compress entry, use int getMethod() method of ZipEntry class.This method returns the method of compression, or -1 if not specified.Compression method can be either STORED or DEFLATED for any zip entry.*/ int method = entry.getMethod(); if(method == ZipEntry.DEFLATED) System.out.println(entry.getName() + "\t\t\t\tDeflated"); else if(method == ZipEntry.STORED) System.out.println(entry.getName() + "\t\t\t\tStored"); else if(method == -1) System.out.println(entry.getName() + "\t\t\t\tNot Specified"); } /* close the opened zip file using,void close() method.*/ zipFile.close(); } catch(IOException ioe) { System.out.println("Error opening zip file" + ioe); } } }