Calculating the Checksum of a File : Zip Tar File « File Input Output « Java

1. Java
2. File Input Output
3. Zip Tar File

Calculating the Checksum of a File

         

import java.io.FileInputStream;
import java.util.zip.Adler32;
import java.util.zip.CheckedInputStream;

public class Main {
  public static void main(String[] argv) throws Exception {
    CheckedInputStream cis = new CheckedInputStream(new FileInputStream("filename"), new Adler32());
    byte[] tempBuf = new byte[128];
    while (cis.read(tempBuf) >= 0) {
    }
    long checksum = cis.getChecksum().getValue();
  }
}

   
    
    
    
    
    
    
    
    
  

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.	Compress string(byte array) by Deflater
35.	Use Java code to zip a folder
36.	Uses Zip compression to compress any number of files given on the command line
37.	Load zip file and scan zip file
38.	Reading the Contents of a ZIP File
39.	UnZip -- print or unzip a JAR or PKZIP file using java.util.zip
40.	Tape Archive Lister: Tar file
41.	Compressing a Byte Array
42.	Tar file stream
43.	Tar file and untar file
44.	bzip source code
45.	Unpack an archive from a URL
46.	Compare two zip files
47.	Determine whether a file is a ZIP File.
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
67.	A frame with a text area to show the contents of a file inside a ZIP archive
68.	Compress object and decompress
69.	Util for extracting *.jar, *.war and *.zip archives.