(Java) Unzip Selected Files from a Zip Archive

Demonstrates how to iterate over the files contained within a .zip and unzip specific files.

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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[])
  {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkZip zip = new CkZip();

    boolean success = zip.OpenZip("my_files.zip");
    if (success != true) {
        System.out.println(zip.lastErrorText());
        return;
        }

    String unzipDir = "/temp/unzipDir";

    int n;

    // Get the number of files and directories in the .zip
    n = zip.get_NumEntries();
    System.out.println(n);

    CkZipEntry entry;

    int i;
    for (i = 0; i <= n - 1; i++) {

        entry = zip.GetEntryByIndex(i);
        if (entry.get_IsDirectory() == false) {
            // (the filename may include a path)
            System.out.println(entry.fileName());

            // Your application may choose to unzip this entry
            // based on the filename.
            // If the entry should be unzipped, then call Extract(unzipDir)
            success = entry.Extract(unzipDir);
            if (success != true) {
                System.out.println(entry.lastErrorText());
                return;
                }

            }

        }
  }
}