Int, Char, double, and byte Conversion

Public class parsetest {</P> <p> // integer to byte array conversion <br/> Public static byte [] inttobyte (INT number) {<br/> int temp = number; <br/> byte [] B = new byte [4]; <br/> for (INT I = B. length-1; I>-1; I --) {<br/> B [I] = new INTEGER (temp & 0xff ). bytevalue (); // Save the highest bit to the lowest Bit <br/> temp = temp> 8; // shift 8 bits to the right <br/>}< br/> return B; <br/>}</P> <p> // converts a byte array to an integer. <br/> Public static int bytetoint (byte [] B) {<br/> int S = 0; <br/> for (INT I = 0; I <3; I ++) {<br/> If (B [I]> = 0) <br/> S = S + B [I]; <br/> else </P> <p> S = S + 256 + B [I]; <br/> S = S * 256; <br/>}< br/> If (B [3]> = 0) // The last one is not multiplied, it may overflow because <br/> S = S + B [3]; <br/> else <br/> S = S + 256 + B [3]; <br/> return s; <br/>}</P> <p> // character to byte conversion <br/> Public static byte [] chartobyte (char ch) {<br/> int temp = (INT) ch; <br/> byte [] B = new byte [2]; <br/> for (INT I = B. length-1; I>-1; I --) {<br/> B [I] = new INTEGER (temp & 0xff ). bytevalue (); // Save the highest bit to the lowest Bit <br/> temp = temp> 8; // shift 8 bits to the right <br/>}< br/> return B; <br/>}</P> <p> // byte to character conversion </P> <p> Public static char bytetochar (byte [] B) {<br/> int S = 0; <br/> If (B [0]> 0) <br/> S + = B [0]; <br/> else <br/> S + = 256 + B [0]; <br/> S * = 256; <br/> If (B [1]> 0) <br/> S + = B [1]; <br/> else <br/> S + = 256 + B [1]; <br/> char CH = (char) s; <br/> return ch; <br/>}</P> <p> // floating point to byte conversion <br/> Public static byte [] doubletobyte (double D) {<br/> byte [] B = new byte [8]; <br/> long l = double. doubletolongbits (d); <br/> for (INT I = 0; I <B. length; I ++) {<br/> B [I] = new long (l ). bytevalue (); <br/> L = L> 8; </P> <p >}< br/> return B; <br/>}</P> <p> // byte to floating point conversion <br/> Public static double bytetodouble (byte [] B) {<br/> long l; </P> <p> L = B [0]; <br/> L & = 0xff; <br/> L | = (long) B [1] <8); <br/> L & = 0 xFFFF; <br/> L | = (long) B [2] <16 ); <br/> L & = 0 xffffff; <br/> L | = (long) B [3] <24); <br/> L & = 0 xffffffffl; <br/> L | = (long) B [4] <32); <br/> L & = 0 xffffffffffl; </P> <p> L | = (long) B [5] <40); <br/> L & = 0 xffffffffffffl; <br/> L | = (long) B [6] <48); </P> <p> L | = (long) B [7] <56); <br/> return double. longbitstodouble (l); <br/>}</P> <p>}