Convert International String to \u Codes in java

Question

How can I convert an international (e.g. Russian) String to \\u numbers (unicode numbers)
e.g. \\u041e\\u041a for OK ?

Answer 1

Just some basic Methods for that (inspired from native2ascii tool):

/**
 * Encode a String like äöü to \u00e4\u00f6\u00fc
 * 
 * @param text
 * @return
 */
public String native2ascii(String text) {
    if (text == null)
        return text;
    StringBuilder sb = new StringBuilder();
    for (char ch : text.toCharArray()) {
        sb.append(native2ascii(ch));
    }
    return sb.toString();
}

/**
 * Encode a Character like ä to \u00e4
 * 
 * @param ch
 * @return
 */
public String native2ascii(char ch) {
    if (ch > '\u007f') {
        StringBuilder sb = new StringBuilder();
        // write \uffffdd
        sb.append("\\u");
        StringBuffer hex = new StringBuffer(Integer.toHexString(ch));
        hex.reverse();
        int length = 4 - hex.length();
        for (int j = 0; j < length; j++) {
            hex.append('0');
        }
        for (int j = 0; j < 4; j++) {
            sb.append(hex.charAt(3 - j));
        }
        return sb.toString();
    } else {
        return Character.toString(ch);
    }
}