Alexandros Schillings
78 lines
1.6 KiB
Java
78 lines
1.6 KiB
Java
package uk.co.alt236.btlescan.util;
|
|
|
|
import java.nio.ByteBuffer;
|
|
|
|
public class ByteUtils {
|
|
private static final String HEXES = "0123456789ABCDEF";
|
|
|
|
/**
|
|
* Gets a pretty representation of a Byte Array as a HEX String.
|
|
*
|
|
* Sample output: [01, 30, FF, AA]
|
|
*
|
|
* @param array the array
|
|
* @return the string
|
|
*/
|
|
public static String byteArrayToHexString(final byte[] array){
|
|
final StringBuffer sb = new StringBuffer();
|
|
boolean firstEntry = true;
|
|
sb.append('[');
|
|
|
|
for ( final byte b : array ) {
|
|
if(!firstEntry){
|
|
sb.append(", ");
|
|
}
|
|
sb.append(HEXES.charAt((b & 0xF0) >> 4));
|
|
sb.append(HEXES.charAt((b & 0x0F)));
|
|
firstEntry = false;
|
|
}
|
|
|
|
sb.append(']');
|
|
return sb.toString();
|
|
}
|
|
|
|
public static int getIntFrom2ByteArray(byte[] input){
|
|
final byte[] result = new byte[4];
|
|
|
|
result[0] = 0;
|
|
result[1] = 0;
|
|
result[2] = input[0];
|
|
result[3] = input[1];
|
|
|
|
return ByteUtils.getIntFromByteArray(result);
|
|
}
|
|
|
|
/**
|
|
* Converts a byte to an int, preserving the sign.
|
|
*
|
|
* For example, FF will be converted to 255 and not -1.
|
|
*
|
|
* @param bite the bite
|
|
* @return the int from byte
|
|
*/
|
|
public static int getIntFromByte(final byte bite){
|
|
return Integer.valueOf(bite & 0xFF);
|
|
}
|
|
|
|
/**
|
|
* Converts a byte array to an integer;
|
|
*
|
|
* @param bytes the bytes
|
|
* @return the int from byte array
|
|
*/
|
|
public static int getIntFromByteArray(final byte[] bytes) {
|
|
return ByteBuffer.wrap(bytes).getInt();
|
|
}
|
|
|
|
|
|
/**
|
|
* Converts a byte array to a long;
|
|
*
|
|
* @param bytes the bytes
|
|
* @return the long from byte array
|
|
*/
|
|
public static long getLongFromByteArray(final byte[] bytes) {
|
|
return ByteBuffer.wrap(bytes).getLong();
|
|
}
|
|
}
|