Home Tutorial Java Corejava Zip Use of size and getInputStream method of ZipFile.

Use of size and getInputStream method of ZipFile.
Posted on: July 21, 2010 at 12:00 AM

In this tutorial you will see the use of size and getInputStream method of ZipFile.

Use of size and getInputStream method of ZipFile.

In this tutorial, We will discuss the use of size and getInputStream method. These methods
are available in ZipFile class. The ZipFile class is used to read entries from zip files.

In this Example, The size() method of ZipFile class returns number of entries in zip file, and
the getInputStream method returns a input stream for reading the contents of zip file entry.
The getName method of ZipEntry class return the name of associated entry. The
hasMoreElements method of Enumeration class checks enumeration has
more elements, and nextElements returns next elements.

About ZIPEntry API:

Return Type	Method	Description
int	size()	The method size() returns the number of entry in a associated zip file.
InputStream	geInputStream()	The method getInputStream() returns a input stream for reading the contents of associated zip file entry.

code


import java.io.*;

import java.util.*;

import java.util.zip.*;

import java.util.zip.ZipEntry;

import java.io.FileOutputStream;



public class ZipGetInStream {

  public static final void main(String[] args) {

    try {

      ZipFile zipFileName = new ZipFile("test.zip");

      Enumeration enumEntries = zipFileName.entries();

  System.out.println("Total number of entries in a zip file :"

          + zipFileName.size());

      while (enumEntries.hasMoreElements()) {

        ZipEntry zipEntry = (ZipEntry) enumEntries.nextElement();

        System.out.println("Name of Extract file :"

            + zipEntry.getName());

  FileOutputStream fout = new FileOutputStream(zipEntry.getName());

        doInStream(zipFileName.getInputStream(zipEntry), fout);

      }

      zipFileName.close();

    } catch (IOException ioe) {

      System.out.println("IOException
:");

      ioe.printStackTrace();

      return;

    }

  }



  public static final void doInStream(InputStream inStream,

      OutputStream outStream) throws IOException {

    byte[] buffer = new byte[1024];

    int length;

    while ((length = inStream.read(buffer)) >= 0)

      outStream.write(buffer, 0, length);

    inStream.close();

    outStream.close();

  }



}

Following is the output if you run the application

C:\java ZipGetInStream
Total number of entries in a zip file :2
Name of Extract file :Document.txt
Name of Extract file :bharat.txt

Download this code

Related Tags for Use of size and getInputStream method of ZipFile.:

«Previous Index Next»

Ask Questions?

If you are facing any programming issue, such as compilation errors or not able to find the code you are looking for.

Ask your questions, our development team will try to give answers to your questions.

Tutorial Topics