Java Utililty Methods Convert via ByteBuffer

List of utility methods to do Convert via ByteBuffer

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Description

The list of methods to do Convert via ByteBuffer are organized into topic(s).

Method

byte[]toByteArray(char[] chars)
Converts a char array into a byte array using the default character set. 
return toByteArray(chars, java.nio.charset.Charset.defaultCharset().name());
byte[]toByteArray(double value)
to Byte Array 
byte[] bytes = new byte[8];
ByteBuffer.wrap(bytes).putDouble(value);
return bytes;
byte[]toByteArray(double[] doubleArray)
to Byte Array 
int times = Double.SIZE / Byte.SIZE;
byte[] bytes = new byte[doubleArray.length * times];
for (int i = 0; i < doubleArray.length; i++) {
    ByteBuffer.wrap(bytes, i * times, times).putDouble(doubleArray[i]);
return bytes;
byte[]toByteArray(float[] floatArray)
to Byte Array 
int times = Float.SIZE / Byte.SIZE;
byte[] bytes = new byte[floatArray.length * times];
for (int i = 0; i < floatArray.length; i++) {
    ByteBuffer.wrap(bytes, i * times, times).putFloat(floatArray[i]);
return bytes;
byte[]toByteArray(InputStream input, boolean nioCopy)
to Byte Array 
ByteArrayOutputStream baos = new ByteArrayOutputStream();
if (nioCopy)
    nioCopy(input, baos);
else
    copy(input, baos);
return baos.toByteArray();
byte[]toByteArray(int i)
to Byte Array 
final ByteBuffer bb = ByteBuffer.allocate(Integer.SIZE / Byte.SIZE);
bb.order(ByteOrder.LITTLE_ENDIAN);
bb.putInt(i);
return bb.array();
byte[]toByteArray(int integer)
to Byte Array 
if (integer <= Short.MAX_VALUE) {
    return toByteArray((short) integer);
return ByteBuffer.allocate(4).putInt(integer).array();
byte[]toByteArray(int value)
Create a fixed-size 32-bit (4 byte) byte[] from an int value using a big endian byte order. 
return toByteArray(value, ByteOrder.BIG_ENDIAN);
byte[]toByteArray(int value)
Returns a big-endian representation of value in a 4-element byte array; equivalent to ByteBuffer.allocate(4).putInt(value).array() . 
return new byte[] { (byte) (value >> 24), (byte) (value >> 16), (byte) (value >> 8), (byte) value };
byte[]toByteArray(int[] data, boolean bigEndian)
to Byte Array 
ByteBuffer byteBuffer = ByteBuffer.allocate(data.length * 4);
if (bigEndian) {
    byteBuffer.order(ByteOrder.BIG_ENDIAN);
} else {
    byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
IntBuffer intBuffer = byteBuffer.asIntBuffer();
intBuffer.put(data);
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