Java Utililty Methods Byte Array from

List of utility methods to do Byte Array from

  1. HOME
  2. Java
  3. B
  4. Byte Array from

Description

The list of methods to do Byte Array from are organized into topic(s).

Method

byte[]getBytesFromHexaText(String text)
get Bytes From Hexa Text 
Scanner scanner = new Scanner(text);
scanner.nextLine(); 
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while (scanner.hasNextLine()) {
    String line = scanner.nextLine().trim();
    if (line.startsWith(";")) {
        continue;
    line = line.replace(" ", "");
    for (int i = 0; i < line.length() / 2; i++) {
        String hexStr = line.substring(i * 2, (i + 1) * 2);
        byte b = (byte) Integer.parseInt(hexStr, 16);
        baos.write(b);
byte[] data = baos.toByteArray();
return data;
byte[]getBytesFromImage(File file)
Gets the Bytes from an Image using an FileInputStream 
FileInputStream fileInputStream = null;
try {
    fileInputStream = new FileInputStream(file);
    byte[] data = new byte[(int) file.length()];
    fileInputStream.read(data);
    fileInputStream.close();
    return data;
} catch (IOException e) {
...
byte[]getBytesFromInt(int value)
byte array from long 
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
dos.writeInt(value);
dos.flush();
return bos.toByteArray();
byte[]getBytesFromList(List values)
byte array from list 
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
for (Object value : values) {
    if (value instanceof String)
        dos.writeUTF((String) value);
    else if (value instanceof Long)
        dos.writeLong((Long) value);
    else if (value instanceof Integer)
...
byte[]getBytesFromObject(Serializable data)
get Bytes From Object 
ByteArrayOutputStream os = new ByteArrayOutputStream();
ObjectOutputStream objos = new ObjectOutputStream(os);
objos.writeObject(data);
objos.flush();
byte[] result = os.toByteArray();
os.close();
objos.close();
return result;
...
byte[]getBytesFromObject(Serializable obj)
get Bytes From Object 
if (obj == null) {
    return null;
ByteArrayOutputStream bo = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(bo);
oos.writeObject(obj);
return bo.toByteArray();
byte[]getBytesFromResource(String resource)
get Bytes From Resource 
InputStream is = ClassLoader.getSystemClassLoader().getResourceAsStream(resource);
try (BufferedInputStream stream = new BufferedInputStream(is)) {
    int len = stream.available();
    byte[] bytes = new byte[len];
    stream.read(bytes, 0, len);
    return bytes;
byte[]getBytesFromStream(int length, ByteArrayInputStream bais)
get Bytes From Stream 
byte[] bytes = new byte[length];
bais.read(bytes, 0, bytes.length);
return bytes;
byte[]getBytesFromString(final String str, final int length, final String coding)
Converts a string to an array of bytes with the length specified 
byte[] result = new byte[length];
int len = str.length();
if (len > length)
    len = length;
try {
    System.arraycopy(str.getBytes(coding), 0, result, 0, len);
} catch (UnsupportedEncodingException ex) {
    System.arraycopy(str.getBytes(), 0, result, 0, len);
...
byte[]getBytesFromText(String text, String charset)
Converts a text into a byte array using the given charset, if possible. 
try {
    return text.getBytes(charset);
} catch (UnsupportedEncodingException e) {
return text.getBytes();