(Java) Compress String Feed to Base64

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed data in base64.

The purpose is to demonstrate the BeginCompressStringENC, MoreCompressStringENC, and EndCompressStringENC methods.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux Java Libs for Android

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

    boolean success;
    CkStringBuilder sbCompressedBase64 = new CkStringBuilder();

    CkCompression compress = new CkCompression();
    compress.put_Algorithm("deflate");
    compress.put_Charset("utf-8");
    compress.put_EncodingMode("base64");

    CkStringBuilder sbIndex = new CkStringBuilder();

    int i;
    for (i = 0; i <= 24; i++) {
        // Note: It is possible (and normal) for a BeginCompress* or MoreCompress* method to return
        // an empty string (or 0 bytes).  When this happens, the input data is not lost.  It will be flushed
        // in a subsequent call.
        sbIndex.Clear();
        sbIndex.AppendInt(i);
        if (i == 0) {
            sbCompressedBase64.Append(compress.beginCompressStringENC(sbIndex.getAsString()));
            }
        else {
            sbCompressedBase64.Append(compress.moreCompressStringENC(sbIndex.getAsString()));
            }

        sbCompressedBase64.Append(compress.moreCompressStringENC(": This is a line of data to be compressed...\r\n"));
        }

    // Flush any remaining output.
    sbCompressedBase64.Append(compress.endCompressStringENC());

    System.out.println("The base64 encoded compressed text:");
    System.out.println(sbCompressedBase64.getAsString());

    // Now decompress in one call:
    String originalText = compress.decompressStringENC(sbCompressedBase64.getAsString());
    System.out.println(originalText);
  }
}