(Java) Check if a File is in Gzip Format

See more Gzip Examples

This example demonstrates how to use the ExamineFile method to determine whether a file is in Gzip format.

The method inspects the contents of the specified file and returns true if the file is recognized as a valid Gzip file, or false if it is not. This is useful for validating input files before attempting to decompress them.

If the method fails (for example, if the file does not exist or cannot be accessed), the CHECK_SUCCESS macro reports the error.

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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 demonstrates how to determine if a file is in Gzip format.

    CkGzip gzip = new CkGzip();

    // The file to examine:
    String filePath = "test.gz";

    // Check if the file is a valid Gzip file:
    boolean isGzip = gzip.ExamineFile(filePath);

    if (isGzip == true) {
        System.out.println("The file is a valid Gzip file.");
        }
    else {
        System.out.println("The file isnot a Gzip file.");
        }
  }
}