com.github.fosin.cdp.util.ByteUtil Maven / Gradle / Ivy

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package com.github.fosin.cdp.util;

/**
 * Created by jimin on 15/12/11.
 *
 * @author 28860823
 * @version $Id: $
 */
public class ByteUtil {

    /**
     * toByteArray
     *
     * @param l a {@link java.lang.Long} object.
     * @return an array of byte.
     */
    public static byte[] toByteArray(Long l) {
        byte[] b = new byte[8];

        for (int i = 0; i < b.length; ++i) {
            b[7 - i] = (byte) ((int) (l.longValue() >>> i * 8));
        }

        return b;
    }

    /**
     * toByteArray
     *
     * @param i a {@link java.lang.Integer} object.
     * @return an array of byte.
     */
    public static byte[] toByteArray(Integer i) {
        byte[] b = new byte[4];

        for (int j = 0; j < 4; ++j) {
            b[3 - j] = (byte) (i.intValue() >>> j * 8);
        }

        return b;
    }
}