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How to read Zip or Jar Archive File using Java ?.

Program to demonstrate how to read Zip or Jar Archive using Java.

package com.hubberspot.examples;

import java.io.File;
import java.io.IOException;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;

public class ZipJarReaderDemo {

 public static void main(String[] args) {

  // 1. Working with zip files ...... 

  // Create a File and pass a .zip file to it
  File file = new File("c:\\temp.zip");

  try {

   // Create a ZipFile object by passing File object 
   // to its constructor. ZipFile Opens a ZIP file 
   // for reading File passed. 
   ZipFile zipFile = new ZipFile(file);

   // ZipFile has a method called as entries()
   // which returns an enumeration of the ZIP 
   // file entries. 
   Enumeration entries = zipFile.entries();

   // looping each file entries by using Enumeration 
   // hasMoreElements() to tests if this enumeration
   // contains more elements.
   while(entries.hasMoreElements())
   {
    // ZipEntry class represents a zip entry file in a zip
    // it is been taken by using nextElement() of Enumeration
    ZipEntry entry = (ZipEntry) entries.nextElement();

    // ZipEntry's getName() returns us the name of file in zip 
    System.out.println("Zip :> File Name : " + entry.getName());

    // Tests whether given file is a Directory or not
    if(entry.isDirectory())
    {
     System.out.println(entry.getName() + " is a Directory");
    }
    else
    {
     System.out.println(entry.getName() + " is a File ");
    }    
   }  
   // closing the zip file
   zipFile.close();
  }
  catch (ZipException e) {

   e.printStackTrace();
  }
  catch (IOException e) {

   e.printStackTrace();
  }

  System.out.println();

  // 2. Working with jar files ...... 

  try {
   // Create a File and pass a .jar file to it
   file = new File("c:\\temp.jar");

   // Create a JarFile object by passing File object 
   // to its constructor. JarFile Opens a JAR file 
   // for reading File passed.
   JarFile jarFile = new JarFile(file);

   // JarFile has a method called as entries()
   // which returns an enumeration of the JAR 
   // file entries.
   Enumeration entries = jarFile.entries();

   // looping each file entries by using Enumeration 
   // hasMoreElements() to tests if this enumeration
   // contains more elements.
   while(entries.hasMoreElements())
   {
    // JarEntry class represents a jar entry file in a jar
    // it is been taken by using nextElement() of Enumeration
    JarEntry entry = (JarEntry) entries.nextElement();

    // JarEntry's getName() returns us the name of file in jar
    System.out.println("Jar :> File Name : " + entry.getName());

    // Tests whether given file is a Directory or not
    if(entry.isDirectory())
    {
     System.out.println(entry.getName() + " is a Directory");
    }
    else
    {
     System.out.println(entry.getName() + " is a File ");
    }    
   } 

   // closing the jar file
   jarFile.close();
  }
  catch(IOException io)
  {
   io.printStackTrace();
  }
 }
}



Output of the program :



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