JCText.java

package ee.esutoniagodesu.util.commons;

import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;

import java.io.UnsupportedEncodingException;

public final class JCText {
    /**
     * Replaces \n characters with space
     */
    public static String jcremoveNewline(String string) {
        if (string == null) return null;
        return string.replaceAll("\n", " ");
    }

    public static String toHex(String string) throws UnsupportedEncodingException {
        return toHex(string, "UTF-8");
    }

    public static String toHex(String string, String charset) throws UnsupportedEncodingException {
        return Hex.encodeHexString(string.getBytes(charset));
    }

    public static String hexToString(String hex) throws DecoderException, UnsupportedEncodingException {
        return hexToString(hex, "UTF-8");
    }

    public static String hexToString(String hex, String charset) throws DecoderException, UnsupportedEncodingException {
        byte[] bytes = Hex.decodeHex(hex.toCharArray());
        return new String(bytes, charset);
    }

    /**
     * A character is described with code points 1-256, like in ASCII or ANSI
     */
    public static String hexToString256(String hex) {
        StringBuilder sb = new StringBuilder();
        char[] hexData = hex.toCharArray();

        for (int count = 0; count < hexData.length - 1; count += 2) {
            int firstDigit = Character.digit(hexData[count], 16);
            int lastDigit = Character.digit(hexData[count + 1], 16);
            int decimal = firstDigit * 16 + lastDigit;
            sb.append((char) decimal);
        }
        return sb.toString();
    }
}