[Java, double to byte]
public byte[] doubleToByte(double d) throws IOException { double l = d ; ByteArrayOutputStream baos = new ByteArrayOutputStream() ; DataOutputStream dos = new DataOutputStream(baos) ; dos.writeDouble(l) ; byte b[] = baos.toByteArray() ; return b ;}
[Java, byte [] to double]
public static double byteToDouble(byte[] b){ long l; l=b[0]; l&=0xff; l|=((long)b[1]<<8); l&=0xffff; l|=((long)b[2]<<16); l&=0xffffff; l|=((long)b[3]<<24); l&=0xffffffffl; l|=((long)b[4]<<32); l&=0xffffffffffl; l|=((long)b[5]<<40); l&=0xffffffffffffl; l|=((long)b[6]<<48); l&=0xffffffffffffffl; l|=((long)b[7]<<56); return Double.longBitsToDouble(l); }
[Java, int to byte]
public byte[] intToByte(int i) { byte[] abyte0 = new byte[4]; abyte0[0] = (byte) (0xff & i); abyte0[1] = (byte) ((0xff00 & i) >> 8); abyte0[2] = (byte) ((0xff0000 & i) >> 16); abyte0[3] = (byte) ((0xff000000 & i) >> 24); return abyte0; }
[Java, byte to int]
public static int bytesToInt(byte[] bytes) { int addr = bytes[0] & 0xFF; addr |= ((bytes[1] << 8) & 0xFF00); addr |= ((bytes[2] << 16) & 0xFF0000); addr |= ((bytes[3] << 24) & 0xFF000000); return addr; }
[Java, char to byte]
Public static byte [] charToByte (char ch) {int temp = (int) ch; byte [] B = new byte [2]; for (int I = B. length-1; I>-1; I --) {B = new Integer (temp & 0xff ). byteValue (); // Save the highest bit in the lowest Bit temp = temp> 8; // shift to the right eight places} return B ;}
[Conversion from java to byte to char]
public static char byteToChar(byte[] b){ int s=0; if(b[0]>0) s+=b[0]; else s+=256+b[0]; s*=256; if(b[1]>0) s+=b[1]; else s+=256+b[1]; char ch=(char)s; return ch; }
[Java, byte to float]
public static float byteToFloat(byte[] v){ ByteBuffer bb = ByteBuffer.wrap(v); FloatBuffer fb = bb.asFloatBuffer(); return fb.get();}
[Java, float to byte]
public static byte[] floatToByte(float v) { ByteBuffer bb = ByteBuffer.allocate(4); byte[] ret = new byte [4]; FloatBuffer fb = bb.asFloatBuffer(); fb.put(v); bb.get(ret); return ret;}