Java

Demonstrate the Global.AutoQBDecode property

The Global.AutoQBDecode property can be set to _TRUE_ to cause Q/B encoded string arguments passed to any Chilkat method to be automatically decoded before being used.

Note: This example requires Chilkat v10.0.0 or later.

Chilkat2 Java

import com.chilkatsoft.chilkat2.Global;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // Turn on auto Q/B decoding for all strings passed to any Chilkat method in any Chilkat class.
        Global glob = new Global();
        glob.setAutoQBDecode(true);

        // ---------------------------------------------------------------------------------------------------------------------------------------------
        // "Q" Encoding

        // Quoted-Printable encoding is primarily used for text that is mostly ASCII with some non-ASCII characters.
        // It encodes these characters in a way that remains mostly readable and compatible with ASCII-only systems.

        // How It Works with UTF-8:
        // - ASCII characters (except special characters like `=`) are encoded as themselves.
        // - Non-ASCII characters are represented by their UTF-8 byte values, each byte encoded as `=` followed by two hexadecimal digits.
        //   For example, the UTF-8 character "é" (U+00E9) is encoded as `=C3=A9`.

        // For example, consider the text "Café" encoded in UTF-8. The UTF-8 bytes for "é" are `C3 A9`, so in Quoted-Printable, it looks like this:  Caf=C3=A9

        // The "Q" encoding has this syntax:  "=?charset?q?encoded_text?="
        // For example: "=?UTF-8?Q?Caf=C3=A9_announcement?="

        // ------
        // "B" Encoding

        // Base64 encoding is used to encode non-ASCII text, making it more suitable for text with a high density of non-ASCII characters, such as those found in non-Western European languages.

        // For example, consider the text "こんにちは" ("Hello" in Japanese).
        // The "B" encoded string would be "=?UTF-8?B?44GT44KT44Gr44Gh44Gv?="

        // ------
        // Q encoding is suitable for text that is mostly ASCII.
        // B Encoding is best for text that is densely packed with non-us-ascii chars, such as non-Latin (Asian) languages.
        // ---------------------------------------------------------------------------------------------------------------------------------------------

        // You can use Chilkat's online tool at Online Binary Encoder to pre-encode your literal strings before
        // inserting them into your source code.

        // When using the online tool, choose either "MIME header Q Encoding" or "MIME Header B Encoding".

        // For example:
        String s_cafe = "=?utf-8?Q?Caf=C3=A9?=";
        StringBuilder s1 = new StringBuilder();
        s1.append(s_cafe);
        System.out.println(s1.getAsString());
        // Output is Café

        String s_hello = "=?UTF-8?B?44GT44KT44Gr44Gh44Gv?=";
        StringBuilder s2 = new StringBuilder();
        s2.append(s_hello);
        System.out.println(s2.getAsString());
        // Output is こんにちは
    }
}