在不将int转成别的类型时,怎么将int转成byte[] 没看明白这句? 下面不符合要求吧?转换类型了public class bety { public static void main(String[] args) { int i; i=10; byte a=(byte)i; System.out.println(a); } }
int a = 111; byte b[] = Integer.toString(a).getBytes(); 直接转不知道,还是需要先转成String吧
/** *Convert an integer to bytes, and save it into the specified byte array from the specified position. *@param piNumber the integer to be converted. *@param piByteLength its value is from 1 to 4, represents how many bytes will be used in dest byte array to save the integer. *If this value is smaller than the actual size of the integer, the higher byte(s) will be truncated. *@param pbArDest the destination byte array to save the converted bytes *@param piStartPos from which position the bytes will be saved. *@return true if the convert procedure success, otherwise return false. *@see com.saili.util.DataConverter#bytesToint(byte pb0,byte pb1,byte pb2,byte pb3,int piByteLength) *@see com.saili.util.DataConverter#bytesToint(byte [] pbArSource,int piStartPos,int piByteLength) */ public static boolean intTobytes(int piNumber,int piByteLength,byte[] pbArDest,int piStartPos) { if(pbArDest == null || piStartPos < 0 || piByteLength<1 || piByteLength>4 || pbArDest.length < piStartPos+piByteLength) return false; //converter here for(int i=0;i<piByteLength;i++){ pbArDest[piStartPos+i] = (byte)((piNumber>> (i*8))& 0xff); } return true; }
没看明白这句?
下面不符合要求吧?转换类型了public class bety { public static void main(String[] args) {
int i;
i=10;
byte a=(byte)i;
System.out.println(a);
}
}
byte b[] = Integer.toString(a).getBytes();
直接转不知道,还是需要先转成String吧
*Convert an integer to bytes, and save it into the specified byte array from the specified position.
*@param piNumber the integer to be converted.
*@param piByteLength its value is from 1 to 4, represents how many bytes will be used in dest byte array to save the integer.
*If this value is smaller than the actual size of the integer, the higher byte(s) will be truncated.
*@param pbArDest the destination byte array to save the converted bytes
*@param piStartPos from which position the bytes will be saved.
*@return true if the convert procedure success, otherwise return false.
*@see com.saili.util.DataConverter#bytesToint(byte pb0,byte pb1,byte pb2,byte pb3,int piByteLength)
*@see com.saili.util.DataConverter#bytesToint(byte [] pbArSource,int piStartPos,int piByteLength)
*/
public static boolean intTobytes(int piNumber,int piByteLength,byte[] pbArDest,int piStartPos)
{
if(pbArDest == null || piStartPos < 0 || piByteLength<1 || piByteLength>4 || pbArDest.length < piStartPos+piByteLength)
return false;
//converter here
for(int i=0;i<piByteLength;i++){
pbArDest[piStartPos+i] = (byte)((piNumber>> (i*8))& 0xff);
}
return true;
}