// Java program to switch the byte ordering of a 32 bit two's complement int

public class byteordering
{
    static int switchbytes(int x)
    {
	long y = (long)x;  // use a 64 bit int to do the work because of sign
	if (x<0) y = y + 0xffffffff;  // convert to unsigned number
	short lsb = y % 256;  // least significant byte
	short l2b = (y/256) % 256;  // 2nd least significant byte
	short m2b = (y/256/256) % 256; // 2nd most signifiatn byte
	short msb = y/256/256/256;     // most significant byte
	y = msb*0x00ffffff + m2b*0x0000ffff + l2b*256 + lsb;
	if (y>0x7fffffff) y = y-0xffffffff;
	return (int)y;
    }
    public static void main(String[] argv)
    {
	int x = Integer.parseInt(argv[0]);
        int xr = switchbytes(x);
	System.out.printf("reversed: %x",xr);
    }
}