Determine whether a file is a ZIP File. : Zip Tar File « File Input Output « Java

Java

1.	2D Graphics GUI
2.	3D
3.	Advanced Graphics
4.	Ant
5.	Apache Common
6.	Chart
7.	Class
8.	Collections Data Structure
9.	Data Type
10.	Database SQL JDBC
11.	Design Pattern
12.	Development Class
13.	EJB3
14.	Email
15.	Event
16.	File Input Output
17.	Game
18.	Generics
19.	GWT
20.	Hibernate
21.	I18N
22.	J2EE
23.	J2ME
24.	JDK 6
25.	JNDI LDAP
26.	JPA
27.	JSP
28.	JSTL
29.	Language Basics
30.	Network Protocol
31.	PDF RTF
32.	Reflection
33.	Regular Expressions
34.	Scripting
35.	Security
36.	Servlets
37.	Spring
38.	Swing Components
39.	Swing JFC
40.	SWT JFace Eclipse
41.	Threads
42.	Tiny Application
43.	Velocity
44.	Web Services SOA
45.	XML

Java Tutorial

Java Source Code / Java Documentation

Illustrator Tutorials

GIMP Tutorials

C# / C Sharp

C# / CSharp Tutorial

C# / CSharp Open Source

SQL Server / T-SQL Tutorial

Oracle PL / SQL

Oracle PL/SQL Tutorial

Flash / Flex / ActionScript

VBA / Excel / Access / Word

XML

XML Tutorial

Microsoft Office PowerPoint 2007 Tutorial

Microsoft Office Excel 2007 Tutorial

Microsoft Office Word 2007 Tutorial

Java » File Input Output » Zip Tar File

Screenshots

Determine whether a file is a ZIP File.


     



import java.io.BufferedInputStream;

import java.io.DataInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.util.zip.ZipFile;



public class Main {





  /**

   * Determine whether a file is a ZIP File.

   */

  public static boolean isZipFile(File file) throws IOException {

      if(file.isDirectory()) {

          return false;

      }

      if(!file.canRead()) {

          throw new IOException("Cannot read file "+file.getAbsolutePath());

      }

      if(file.length() < 4) {

          return false;

      }

      DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));

      int test = in.readInt();

      in.close();

      return test == 0x504b0304;

  }

}

Related examples in the same category

1.	Extract contents of a zip file
2.	List the contents of a zip file
3.	Read entries in a zip / compressed file
4.	Decompress a zip file using ZipInputStream
5.	Decompress a zip file using ZipFile
6.	Create checksum for a zip file
7.	Read a zip file checksum value
8.	Create a zip file with java.util.zip package
9.	Extract file/files from a zip file
10.	Read files within a zip file
11.	Retrieve a compressed file from a ZIP file
12.	Retrieve the contents of a ZIP file
13.	Making a zip file of directory including its subdirectories recursively
14.	Displaying contents of a compressed zip file
15.	Compress a Byte Array
16.	Decompress a Byte Array
17.	Read zip file
18.	Write Zip file
19.	The java.util.zip package can be used to create a checksum.
20.	Read the content of a zip file ZipFile
21.	List the entries of a zip file
22.	Compressing Streams: Zipper, Java example
23.	Compressing Streams: Parity Checksum
24.	Compressing Streams: File Summer
25.	Create a simple ZIP File: not retain any directory path information about the files.
26.	Decompress a ZIP file.
27.	Decompressing a Byte Array
28.	Zip unzip byte array
29.	Creating a ZIP File
30.	Listing the Contents of a ZIP File
31.	Retrieving a Compressed File from a ZIP File
32.	Calculating the Checksum of a Byte Array (Compute Adler-32 checksum)
33.	Compute CRC-32 checksum
34.	Calculating the Checksum of a File
35.	Compress string(byte array) by Deflater
36.	Use Java code to zip a folder
37.	Uses Zip compression to compress any number of files given on the command line
38.	Load zip file and scan zip file
39.	Reading the Contents of a ZIP File
40.	UnZip -- print or unzip a JAR or PKZIP file using java.util.zip
41.	Tape Archive Lister: Tar file
42.	Compressing a Byte Array
43.	Tar file stream
44.	Tar file and untar file
45.	bzip source code
46.	Unpack an archive from a URL
47.	Compare two zip files
48.	Zip up a directory
49.	Check sum for a path
50.	Check sum for an InputStream
51.	Extract zip file to destination folder
52.	Return the first directory of this archive. This is needed to determine the plugin directory
53.	Makes a zip file named xmlFileName from xmlURL at path
54.	Unzipps a zip file placed at zipURL to path
55.	A single checksum calculation for multiple files
56.	Put file To Zip File
57.	Provides both writing and reading from a file which is transparently compressed in Zip
58.	TarInputStream reads a UNIX tar archive as an InputStream
59.	TarOutputStream writes a UNIX tar archive as an OutputStream
60.	Package files utility
61.	Zip Compare
62.	Unpack a segment from a zip
63.	Unpack a zip file
64.	Unzip file to a directory
65.	Zip a list of file into one zip file.
66.	Validate that an archive contains a named entry

www.java2java.com | Contact Us

All other trademarks are property of their respective owners.