Java Unsigned Number Create unsignedLong(byte b)

Description

Get the specified byte's value as an unsigned long.

License

Open Source License

Parameter

Parameter	Description
b	the byte to convert.

Return

An unsigned long representing the specified byte.

Declaration

public static long unsignedLong(byte b) 

Method Source Code

//package com.java2s;
/*/* www.  j  a  v  a  2s . c om*/
 * Copyright (C) 2014 Jesse Caulfield 
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * Get the specified byte's value as an unsigned long.
     * <p>
     * This converts the specified byte into a long. The least significant byte (8
     * bits) of the long will be identical to the byte (8 bits) provided, and the
     * most significant 7 bytes (56 bits) of the long will be zero.
     * <p>
     * For many of the values in this USB API, unsigned bytes are used. However,
     * since Java does not include unsigned bytes in the language, those unsigned
     * bytes must be converted to a larger storage type before being used in
     * unsigned calculations.
     *
     * @param b the byte to convert.
     * @return An unsigned long representing the specified byte.
     */
    public static long unsignedLong(byte b) {
        return 0x00000000000000ff & b;
    }

    /**
     * Get the specified short's value as an unsigned long.
     * <p>
     * This converts the specified byte into a long. The least significant short
     * (16 bits) of the long will be identical to the short (16 bits) provided,
     * and the most significant 6 bytes (48 bits) of the long will be zero.
     * <p>
     * For many of the values in this USB API, unsigned shorts are used. However,
     * since Java does not include unsigned short in the language, those unsigned
     * shorts must be converted to a larger storage type before being used in
     * unsigned calculations.
     *
     * @param s the short to convert.
     * @return An unsigned long representing the specified short.
     */
    public static long unsignedLong(short s) {
        return 0x000000000000ffff & s;
    }

    /**
     * Get the specified int's value as an unsigned long.
     * <p>
     * This converts the specified int into a long. The least significant int (32
     * bits) of the long will be identical to the int (32 bits) provided, and the
     * most significant int (32 bits) of the long will be zero.
     *
     * @param i the int to convert.
     * @return An unsigned long representing the specified int.
     */
    public static long unsignedLong(int i) {
        return 0x00000000ffffffff & i;
    }
}

Related

1. unsignedIntValue(byte[] data, int offset)
2. unsignedLeb128Size(int value)
3. unsignedLessThan(long a, long b)
4. unsignedLocalIntersect2by2(final short[] set1, final int length1, final short[] set2, final int length2, final short[] buffer)
5. unsignedLocalIntersect2by2Cardinality(final short[] set1, final int length1, final short[] set2, final int length2)
6. unsignedLongToByteArray(final long value)
7. unsignedLongToString(long value)
8. unsignedLongToString(long x)
9. unsignedMediumToBytes(final Long unsignedInt)