Java

Compress and Decompress a String

See more Compression Examples

Demonstrates how to compress and decompress a string. 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.

    CkStringBuilder sb = new CkStringBuilder();

    int i;
    for (i = 1; i <= 20; i++) {
        sb.Append("This is the original uncompressed string.\r\n");
        }

    CkCompression compress = new CkCompression();
    compress.put_Algorithm("deflate");
    //  Indicate that the utf-8 byte representation of the string should be compressed.
    compress.put_Charset("utf-8");

    CkByteData compressedBytes = new CkByteData();
    success = compress.CompressString(sb.getAsString(),compressedBytes);

    //  If the compressed data is desired in string format, then get the base64 representation of the bytes.
    compress.put_EncodingMode("base64");
    String compressedBase64 = compress.compressStringENC(sb.getAsString());
    System.out.println("Compressed Bytes as Base64: " + compressedBase64);

    //  Now decompress...
    String decompressedString = compress.decompressString(compressedBytes);
    System.out.println("The original string after decompressing from binary compressed data:");
    System.out.println(decompressedString);

    //  To decompress from Base64...
    compress.put_EncodingMode("base64");
    decompressedString = compress.decompressStringENC(compressedBase64);
    System.out.println("The original string after decompressing from Base64:");
    System.out.println(decompressedString);
  }
}