Java

Compress Text Feed to Binary

See more Compression Examples

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed binary data. Java

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.

    CkBinData bdCompressed = new CkBinData();

    CkCompression compress = new CkCompression();
    compress.put_Algorithm("deflate");
    compress.put_Charset("utf-8");

    CkStringBuilder sbUncompressedChunk = new CkStringBuilder();

    compress.put_FirstChunk(true);
    compress.put_LastChunk(false);

    int i;
    for (i = 0; i <= 24; i++) {
        if (i == 24) {
            compress.put_LastChunk(true);
            }

        sbUncompressedChunk.Clear();
        sbUncompressedChunk.AppendInt(i);
        sbUncompressedChunk.Append(": This is a line of data to be compressed...\r\n");

        compress.CompressSb(sbUncompressedChunk,bdCompressed);

        compress.put_FirstChunk(false);
        }

    // Show the compressed data in hex format:
    System.out.println("The hex encoded compressed text:");
    System.out.println(bdCompressed.getEncoded("hex"));

    // Now decompress in one call.  It is important to set both FirstChunk and LastChunk = true
    CkBinData bdDecompressed = new CkBinData();
    compress.put_FirstChunk(true);
    compress.put_LastChunk(true);
    success = compress.DecompressBd2(bdCompressed,bdDecompressed);
    if (success == false) {
        System.out.println(compress.lastErrorText());
        return;
        }

    String originalText = bdDecompressed.getString("utf-8");
    System.out.println(originalText);
  }
}