Java BitSet toByteArray(BitSet bits)

Description

to Byte Array

License

Open Source License

Declaration

public static byte[] toByteArray(BitSet bits) 

Method Source Code

//package com.java2s;
/**/*from www .j  a  v a2  s.c o m*/
 * Project: ${puma-common.aid}
 * 
 * File Created at 2012-6-24
 * $Id$
 * 
 * Copyright 2010 dianping.com.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * Dianping Company. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with dianping.com.
 */

import java.util.BitSet;

public class Main {
    public static byte[] toByteArray(BitSet bits) {
        byte[] bytes = new byte[bits.length() / 8 + 1];
        for (int i = 0; i < bits.length(); i++) {
            if (bits.get(i)) {
                bytes[bytes.length - i / 8 - 1] |= 1 << (i % 8);
            }
        }
        return bytes;
    }

    /**
     * 
     */
    public static byte[] toByteArray(byte num) {
        return new byte[] { num };
    }

    public static byte[] toByteArray(short num) {
        final byte[] r = new byte[2];
        for (int i = 0; i < 2; i++) {
            r[i] = (byte) (num >>> (8 - i * 8));
        }
        return r;
    }

    public static byte[] toByteArray(int num) {
        final byte[] r = new byte[4];
        for (int i = 0; i < 4; i++) {
            r[i] = (byte) (num >>> (24 - i * 8));
        }
        return r;
    }

    public static byte[] toByteArray(long num) {
        final byte[] r = new byte[8];
        for (int i = 0; i < 8; i++) {
            r[i] = (byte) (num >>> (56 - i * 8));
        }
        return r;
    }
}

Related

1. toBitSet(byte[] array)
2. toBitSet(byte[] bytes)
3. toBitSet(final byte[] bytes)
4. toBitSet(String data)
5. toBitSet(String s, int length)
6. toByteArray(BitSet bits)
7. toByteArray(BitSet bits, int fixedNumBytes)
8. toByteArray(BitSet bits, int sizeInBytes)
9. toByteArray(BitSet bitSet)