Example usage for java.nio ByteBuffer allocate

Introduction

In this page you can find the example usage for java.nio ByteBuffer allocate.

Prototype

public static ByteBuffer allocate(int capacity)

Source Link

Document

Creates a byte buffer based on a newly allocated byte array.

Usage

From source file:Main.java

public static long bytesToLong(byte[] bytes) {
    long l = 0;//from w  ww.j  a v  a2 s  .com
    try {
        ByteBuffer buffer = ByteBuffer.allocate(8);
        buffer.put(bytes, 0, bytes.length);
        buffer.flip();//need flip
        l = buffer.getLong();
    } catch (Exception e) {

    }
    return l;
}

From source file:Main.java

public static short toUnsignedByte(byte bytes) {
    bb = ByteBuffer.allocate(1);
    bb.put(bytes);/*from w  ww .  j a v a2s .  c  o  m*/
    bb.order(ByteOrder.LITTLE_ENDIAN);
    return (short) (bb.get() & 0xff);
}

From source file:Main.java

public static ByteBuffer clone(ByteBuffer original) {
    ByteBuffer clone = ByteBuffer.allocate(original.capacity());
    original.rewind();//copy from the beginning
    clone.put(original);/*  w w w  .  j av  a2s  . co  m*/
    original.rewind();
    clone.flip();
    return clone;
}

From source file:Main.java

private static byte[] longToBytes(long value) {
    ByteBuffer buffer = ByteBuffer.allocate(BYTE_BUFFER_CAPACITY);
    buffer.putLong(value);/*  ww  w .j  ava2 s  . c o  m*/
    return buffer.array();
}

From source file:Main.java

public static byte[] shortToByteArray(int value) {
    ByteBuffer bb = ByteBuffer.allocate(2);
    bb.order(ByteOrder.LITTLE_ENDIAN);
    bb.putShort((short) value);
    return bb.array();
}

From source file:Main.java

public static byte[] intToByteArray(int value) {
    ByteBuffer buffer = ByteBuffer.allocate(Integer.SIZE / Byte.SIZE);
    buffer.order(ByteOrder.BIG_ENDIAN);
    buffer.putInt(value);/*from w ww . j  a  v  a  2s  .co  m*/
    return buffer.array();
}

From source file:Main.java

public static int readInt(byte[] message, int start) {
    /* Read in the type */
    ByteBuffer typeBuffer = ByteBuffer.allocate(4).order(ByteOrder.BIG_ENDIAN);
    typeBuffer.put(message, start, 4).position(0);
    return typeBuffer.getInt();
}

From source file:Main.java

public static byte[] intToByteArrayLE(int value) {
    ByteBuffer buffer = ByteBuffer.allocate(Integer.SIZE / Byte.SIZE);
    buffer.order(ByteOrder.LITTLE_ENDIAN);
    buffer.putInt(value);/*from w  w w.j av  a2 s.  c  om*/
    return buffer.array();
}

From source file:Main.java

public static byte[] shortToByteArray(short value) {
    ByteBuffer buffer = ByteBuffer.allocate(Short.SIZE / Byte.SIZE);
    buffer.order(ByteOrder.BIG_ENDIAN);
    buffer.putShort(value);// w  ww  .  j a  v  a2  s  .c  om
    return buffer.array();
}

From source file:Main.java

public static byte[] shortToByteArrayLE(short value) {
    ByteBuffer buffer = ByteBuffer.allocate(Short.SIZE / Byte.SIZE);
    buffer.order(ByteOrder.LITTLE_ENDIAN);
    buffer.putShort(value);//  w w  w  .  j  a  v  a2  s. c o  m
    return buffer.array();
}