The getCrc() function is a part of java.util.zip package. The function returns the CRC – 32 checksum value of a specific ZipEntry .
The CRC is an error detecting code used to detect error in raw data.
Function Signature :
public long getCrc()
Syntax :
zip_entry.getCrc();
Parameters :No parameter is required for this function.
Return value :The function returns a long value, the Crc of this ZipEntry.
Exceptions :The function does not throw any exception.0
Below programs illustrates the use of getCrc() function
Example 1: We will create a file named zip_file and get the zip file entry using getEntry() function and then get the CRC-32 of the specified ZipEntry.”file.zip” is a zip file present in f: directory. we will take a “.zip” file as ZipEntry
// Java program to demonstrate the// use of getCrc() function import java.util.zip.*;import java.util.Enumeration;import java.util.*;import java.io.*; public class solution { public static void main(String args[]) { try { // Create a Zip File ZipFile zip_file = new ZipFile("f:\\file1.zip"); // get the Zip Entry using // the getEntry() function ZipEntry entry = zip_file.getEntry("file.zip"); // Get the Crc // using the getCrc() // function long input = entry.getCrc(); // Display the Crc System.out.println("Crc : " + input); } catch (Exception e) { System.out.println(e.getMessage()); } }} |
Crc : 1798120178
Example 2: We will create a file named zip_file and get the zip file entry using getEntry() function and then get the CRC-32 of the specified ZipEntry.”file.zip” is a zip file present in f: directory. we will take a “.cpp” file as ZipEntry
// Java program to demonstrate the// use of getCrc() function import java.util.zip.*;import java.util.Enumeration;import java.util.*;import java.io.*; public class solution { public static void main(String args[]) { try { // Create a Zip File ZipFile zip_file = new ZipFile("f:\\file1.zip"); // get the Zip Entry using // the getEntry() function ZipEntry entry = zip_file.getEntry("file1.cpp"); // Get the Crc // using the getCrc() // function long input = entry.getCrc(); // Display the Crc System.out.println("Crc : " + input); } catch (Exception e) { System.out.println(e.getMessage()); } }} |
Crc : 3528251335
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/zip/ZipEntry.html#getCrc–