Android Open Source - msghandle Byte And Int

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Back to project page msghandle.

License

The source code is released under:

GNU General Public License

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Java Source Code

package com.anlong.msghandle.util;
/* w w w  .j a v  a2  s  .co  m*/
/**
 * @Title: ByteAndInt.java 
 * @Package com.anlong.msghandle.util
 * @company ShenZhen AnLong Technology CO.,LTD.   
 * @author lixl   
 * @date 2014-3-12 ????3:43:57 
 * @version V1.0   
 * @Description: TODO
 */
public class ByteAndInt {

  public static byte[] short2ByteArray(short s) {
    byte[] shortBuf = new byte[2];
    for (int i = 0; i < 2; i++) {
      int offset = (shortBuf.length - 1 - i) * 8;
      shortBuf[i] = (byte) ((s >>> offset) & 0xff);
    }
    return shortBuf;
  }

  public static final int byteArray2Short(byte[] b) {
    return (b[0] << 8) + (b[1] & 0xFF);
  }

  public static byte[] int2ByteArray(int value) {
    byte[] b = new byte[4];
    for (int i = 0; i < 4; i++) {
      int offset = (b.length - 1 - i) * 8;
      b[i] = (byte) ((value >>> offset) & 0xFF);
    }
    return b;
  }
  public static byte[] int2ByteArray3(int value) {
    byte[] b = new byte[3];
    for (int i = 0; i < 3; i++) {
      int offset = (b.length - 1 - i) * 8;
      b[i] = (byte) ((value >>> offset) & 0xFF);
    }
    return b;
  }
  public static byte[] int2ByteArray1(int value) {
    byte[] b = new byte[1];
    for (int i = 0; i < 1; i++) {
      int offset = (b.length - 1 - i) * 8;
      b[i] = (byte) ((value >>> offset) & 0xFF);
    }
    return b;
  }  
  public static byte int2Byte(int value) {
    byte b = 0;
      b = (byte) (value & 0xFF);
    return b;
  }
  public static final int byteArray2Int(byte[] b) {
    return (b[0] << 24) + ((b[1] & 0xFF) << 16) + ((b[2] & 0xFF) << 8)
        + (b[3] & 0xFF);
  }
  public static final int byteArray2Int1(byte[] b) {
    return (b[0] & 0xFF);
  }
  public static final int byte2Int(byte b) {
    return (b & 0xFF);
  }
  public static final int byteArray2Int3(byte[] b) {
    return ((b[0] & 0xFF) << 16) + ((b[1] & 0xFF) << 8)+ (b[2] & 0xFF);
  }
  public static void main(String[] args){
    byte b[] = int2ByteArray1(222);
  }
  public static byte int2ByteArray11(int value) {
    byte[] b = new byte[1];
    for (int i = 0; i < 1; i++) {
      int offset = (b.length - 1 - i) * 8;
      b[i] = (byte) ((value >>> offset) & 0xFF);
    }
    return b[0];
  }

  public static byte[] longToByteArray(long a) {
    byte[] bArray = new byte[8];
    for (int i = 0; i < bArray.length; i++) {
      bArray[i] = new Long(a & 0XFF).byteValue();
      a >>= 8;
    }
    return bArray;
  }

  public static long byteArrayToLong(byte[] bArray) {
    long a = 0;
    for (int i = 0; i < bArray.length; i++) {
      a += (long) ((bArray[i] & 0XFF) << (8 * i));
    }
    return a;
  }
}

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