(Java) Find a ZIP Entry by Exact Path Using EntryOf

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This example demonstrates how to use the EntryOf method to find a ZIP entry whose stored path exactly matches a specified path.

Unlike EntryMatching, which performs wildcard matching, EntryOf performs an exact path lookup.

This method is useful when:

• The exact ZIP path is already known
• Retrieving a specific file or directory entry
• Verifying whether a particular entry exists in the ZIP archive

Suppose the ZIP archive contains:

docs/
docs/readme.txt
docs/manual.pdf
images/logo.png
data/config/settings.json

ZIP archives may optionally contain explicit directory entries such as docs/. These directory entries can also be retrieved using EntryOf.

The example:

• Finds an exact file entry
• Finds an exact directory entry
• Demonstrates the difference between file and directory entries

Note: This example requires Chilkat v11.0.0 or greater.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    success = false;

    // Open an existing ZIP archive.
    CkZip zip = new CkZip();

    success = zip.OpenZip("example.zip");
    if (success == false) {
        System.out.println(zip.lastErrorText());
        return;
        }

    CkZipEntry entry = new CkZipEntry();

    // ------------------------------------------------------------
    // Find a specific file entry by its exact ZIP path.

    success = zip.EntryOf("docs/readme.txt",entry);

    if (success == true) {
        System.out.println("Found file entry:");
        System.out.println("  FileName = " + entry.fileName());
        System.out.println("  IsDirectory = " + entry.get_IsDirectory());
        System.out.println("");
        }

    // ------------------------------------------------------------
    // Find a directory entry.
    // 
    // ZIP archives may optionally contain explicit directory entries.
    // In this example, "docs/" is a separate directory entry.

    success = zip.EntryOf("docs/",entry);

    if (success == true) {
        System.out.println("Found directory entry:");
        System.out.println("  FileName = " + entry.fileName());
        System.out.println("  IsDirectory = " + entry.get_IsDirectory());
        System.out.println("");
        }

    // ------------------------------------------------------------
    // Attempt to find a non-existent entry.

    success = zip.EntryOf("images/missing.png",entry);

    if (success == false) {
        System.out.println("The entry images/missing.png was not found.");
        }

    zip.CloseZip();

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