Java

Set the Charset of an Attachment

Demonstrates the Chilkat Email.SetAttachmentCharset method, which sets the charset parameter of the Content-Type header field for the attachment at a given zero-based index. This example adds a text attachment and sets its charset to utf-8.

Background: For a text attachment, the charset parameter tells the receiving client which character encoding the bytes use, so accented or non-Latin text renders correctly. Setting it explicitly (typically utf-8) removes ambiguity when the attachment contains non-ASCII content — without it, a client may guess wrong and display garbled characters.

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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;

    //  Demonstrates the SetAttachmentCharset method, which sets the charset parameter of the
    //  Content-Type header field for the attachment at the given zero-based index.

    CkEmail email = new CkEmail();
    email.put_Subject("Set attachment charset");

    email.AddStringAttachment("notes.txt","Some notes.");

    //  Set the charset of the first attachment (index 0) to utf-8.
    success = email.SetAttachmentCharset(0,"utf-8");
    if (success == false) {
        System.out.println(email.lastErrorText());
        return;
        }

    //  The attachment's Content-Type now includes charset="utf-8".
    System.out.println(email.getMime());
  }
}