A class that encodes URL parameter values for MIDP devices. : Utilities « Network Protocol « Java

A class that encodes URL parameter values for MIDP devices.

Chapter 3 - Simple Protocols
Java 2 Network Protocols Black Book
by Al Williams    
Paraglyph Press 2001

 * A class that encodes URL parameter values
 * for MIDP devices.
public class EncodeURL {

    // The characters that do not need to
    // be converted.
    private static final String noEncode =
        "abcdefghijklmnopqrstuvwxyz" +

    // Mapping value values 0 through 15 to the
    // corresponding hexadecimal character.
    private static final char[] hexDigits = {
        '0', '1', '2', '3', '4', '5', '6', '7',
        '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'

    // Encodes the given string as required for
    // use in a URL query string or POST data.
    public static String encode(String src) {
        StringBuffer result = new StringBuffer(src.length());
        int count = src.length();
        for (int i = 0; i < count; i++) {
            char c = src.charAt(i);
            if (noEncode.indexOf(c) != -1) {
                // This is a character that does not
                // need to be encoded

            // Space is converted to '+'
            if (c == ' ') {

            // The remaining characters must be converted to
            // '%XY' where 'XY' is the hexadecimal value of
            // the character itself.
            result.append(hexDigits[(c >> 4) & 0xF]);
            result.append(hexDigits[c & 0xF]);
        return result.toString();


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