ZipFile size() function in Java with examples

The size() function is a part of java.util.zip package. The function returns the number of entries of the zip file.

Function Signature:

public int size()

Syntax:



zip_file.size();

Parameters: The function does not require any parameters
Return value: The function returns a Integer, which is the number of entries of the zip file
Exceptions: The function throws IllegalStateException if the zip file has been closed

Below programs illustrates the use of size() function
Example 1: Create a file named zip_file and get the number of entries using size() function.”file.zip” is a zip file present in f: directory.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate the
// use of size() function
  
import java.util.zip.*;
  
public class solution {
    public static void main(String args[])
    {
        try {
  
            // Create a Zip File
            ZipFile zip_file
                = new ZipFile("f:\\file.zip");
  
            // Display the number of entries
            // of the zip file
            // using size() function
            System.out.println("number of entries = "
                               + zip_file.size());
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

chevron_right


Output:

number of entries= 7

Example 2: Create a file named zip_file and get the number of entries using size() function. we will try to see whether the function throws an exception if we close the file and then call the function size().

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate the
// use of size() function
  
import java.util.zip.*;
  
public class solution {
    public static void main(String args[])
    {
  
        try {
  
            // Create a Zip File
            ZipFile zip_file
                = new ZipFile("f:\\file.zip");
  
            // close the file
            zip_file.close();
  
            // Display the number of entries
            // of the zip file
            // using size() function
            System.out.println("number of entries = "
                               + zip_file.size());
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

chevron_right


Output:

zip file closed

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/zip/ZipFile.html#size()



My Personal Notes arrow_drop_up

Second year Department of Information Technology Jadavpur University

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.