Java Utililty Methods ASCII

List of utility methods to do ASCII

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Description

The list of methods to do ASCII are organized into topic(s).

Method

charascii(final int c)
ASCII. 
return (char) ((c) <= 9 ? (c) + '0' : (c) + 'A' - 0xA);
byte[]ascii(String string)
Converts a string, which should contain only ascii-representable characters, to a byte[]. 
byte[] bytes = new byte[string.length()];
for (int i = 0; i < string.length(); i++) {
    bytes[i] = (byte) string.charAt(i);
return bytes;
byte[]ascii2Bcd(byte[] asc)
ascii Bcd 
int len = asc.length / 2;
byte[] bcd = new byte[len];
for (int i = 0; i < len; i++) {
    bcd[i] = (byte) ((asc[2 * i] << 4) | asc[2 * i + 1]);
return bcd;
byte[]ascii2BCD(byte[] val, int len)
ascii BCD 
byte[] valByte = new byte[(len + 1) / 2];
if (len % 2 == 0) {
    for (int i = 0; i < len; i++) {
        byte b = val[i];
        if (b > '9') {
            b = (byte) (b % 0x10 + 9);
        } else {
            b = (byte) (b % 0x10);
...
byte[]AsciiBTAddressToBytes(String btAddress)
Converts a nicely formatted Bluetooth address to string of bytes representing the address 
if (btAddress.length() != 17)
    return null;
String[] tokens = btAddress.split(":");
if (tokens.length != 6)
    return null;
byte[] finalResult = new byte[tokens.length];
int i = 0;
for (String val : tokens) {
...
byte[]asciiBytes(String x)
ascii Bytes 
byte[] res = new byte[x.length()];
for (int len = x.length(), i = 0; i < len; ++i)
    res[i] = (byte) x.charAt(i);
return res;
charasciiChar(int value)
ascii Char 
if (value < 0x20 || value > 0x7e) {
    return '.';
} else {
    return (char) value;
voidasciiChars()
ascii Chars 
for (int code = 0; code < 128; code++) {
    System.out.println("code=" + code + ",0x" + Integer.toHexString(code) + " [" + (char) code + "]");
byte[]asciiCharToBytes(char[] chars)
Converts characters from ascii encoded text to a byte[] and zero outs the original char[] 
byte[] bytes = new byte[chars.length];
for (int i = 0; i < chars.length; i++) {
    bytes[i] = (byte) chars[i];
    chars[i] = '\0';
return bytes;
StringasciiDump(byte[] in)
ascii Dump 
String out = new String("");
for (int i = 0; i < in.length; i++)
    out += ((in[i] & 0xFF) == 0) ? '_' : (char) (in[i] & 0xFF);
return out;