Mega Code Archive
Byte Converter
<![CDATA[
//package net.capstone.cra.smartcontroller.util;
/**
* The Class ByteConverter.
*/
class ByteConverter {
/**
* Int2byte.
* integer type convert to byte type
*
* @param i the i
* @return the byte[]
*/
public static byte[] int2byte(int i) {
byte[] array = new byte[4];
array[3] = (byte) (i & 0xff);
array[2] = (byte) ((i >> 8) & 0xff);
array[1] = (byte) ((i >> 16) & 0xff);
array[0] = (byte) ((i >> 24) & 0xff);
return array;
}
/**
* Byte2int.
* byte type convert to integer type.
*
* @param bytes the bytes
* @param start the start
* @return the int
*/
public static int byte2int(byte[] bytes, int start) {
int newValue = 0;
newValue |= (((int) bytes[start + 0]) << 24) & 0xFF000000;
newValue |= (((int) bytes[start + 1]) << 16) & 0xFF0000;
newValue |= (((int) bytes[start + 2]) << 8) & 0xFF00;
newValue |= (((int) bytes[start + 3])) & 0xFF;
return newValue;
}
/**
* Float2bytes.
* float type convert to byte type.
*
* @param value the value
* @return the byte[]
*/
public static byte[] float2bytes(float value) {
byte[] array = new byte[4];
int intBits = Float.floatToIntBits(value);
array[0] = (byte) ((intBits & 0x000000ff) >> 0);
array[1] = (byte) ((intBits & 0x0000ff00) >> 8);
array[2] = (byte) ((intBits & 0x00ff0000) >> 16);
array[3] = (byte) ((intBits & 0xff000000) >> 24);
return array;
}
/**
* Byte2float.
* byte type convert to float type
*
* @param arr the arr
* @param start the start
* @return the float
*/
public static float byte2float(byte[] arr, int start) {
int i = 0;
int len = 4;
int cnt = 0;
byte[] tmp = new byte[len];
for (i = start; i < (start + len); i++) {
tmp[cnt] = arr[i];
cnt++;
}
int accum = 0;
i = 0;
for (int shiftBy = 0; shiftBy < 32; shiftBy += 8) {
accum |= ((long) (tmp[i] & 0xff)) << shiftBy;
i++;
}
return Float.intBitsToFloat(accum);
}
}
]]>