Convert A Byte Array To An Int

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    /**
     * Convert the byte array to an int.
     *
     * @param b The byte array
     * @return The integer
     */
    public static int byteArrayToInt(byte[] b) {
        return byteArrayToInt(b, 0);
    }

    /**
     * Convert the byte array to an int starting from the given offset.
     *
     * @param b The byte array
     * @param offset The array offset
     * @return The integer
     */
    public static int byteArrayToInt(byte[] b, int offset) {
        int value = 0;
        for (int i = 0; i < 4; i++) {
            int shift = (4 - 1 - i) * 8;
            value += (b[i + offset] & 0x000000FF) << shift;
        }
        return value;
    }

Tags:
• java

Comments

Snippets Manager replied on Mon, 2010/03/08 - 3:44pm

Doesn't work if a byte has a leading zero, such as cb or 88. convert the sequence 0010cb88, and this method gives 11006780 which is wrong. should be 819456. DFF.

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