Java Requires Chilkat v11.0.0+

Iterate Over ZIP Entries Using EntryAt

This example demonstrates how to use the EntryAt method to iterate over all entries contained within a ZIP archive.

The EntryAt method retrieves a ZipEntry object for a given zero-based index.

This is useful for:

• Enumerating all entries in a ZIP archive
• Inspecting filenames, sizes, and timestamps
• Searching or filtering ZIP contents

Suppose the ZIP archive contains:

docs/readme.txt
images/logo.png
data/config.json

The example loops through all ZIP entries and prints information about each entry.

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Zip;
import com.chilkatsoft.chilkat2.ZipEntry;

public class ChilkatExample {

    public static void main(String[] args) {
        // Open an existing ZIP archive.
        Zip zip = new Zip();

        try {
            zip.openZip("example.zip");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Get the total number of entries in the ZIP archive.
        int numEntries = zip.getNumEntries();

        System.out.println("Number of ZIP entries = " + numEntries);

        // Create a ZipEntry object that will be reused
        // for each entry retrieved by EntryAt.
        ZipEntry entry = new ZipEntry();

        // Iterate over all ZIP entries.
        int i = 0;
        while (i < numEntries) {
            // Retrieve the entry at index i.
            try {
                zip.entryAt(i, entry);
            } catch (ChilkatException e) {
                System.out.println(e.getLastErrorText());
                return;
            }

            System.out.println("Entry " + i);
            System.out.println("  FileName: " + entry.getFileName());
            System.out.println("  Uncompressed Length: " + entry.getUncompressedLength());
            System.out.println("  Compressed Length: " + entry.getCompressedLength());
            System.out.println("");

            i = i + 1;
        }

        // Sample output:
        //
        // Entry 0
        //   FileName: docs/readme.txt
        //   Uncompressed Length: 1204
        //   Compressed Length: 512
        //
        // Entry 1
        //   FileName: images/logo.png
        //   Uncompressed Length: 84211
        //   Compressed Length: 84102
        //

        zip.closeZip();

        System.out.println("Done.");
    }
}