Write a program to swap odd and even bits in an integer with as few instructions as possible (e.g., bit 0 and bit! are swapped, bit 2 and bit 3 are swapped, and so on).

CC150-5.6.java

package POJ;

public class Main{
 
	/**
	 * 
	 * 5.6 Write a program to swap odd and even bits in an integer with as few instructions 
	 * as possible (e.g., bit 0 and bit! are swapped, bit 2 and bit 3 are swapped, and so on).
	 * 
	 * 
	 */
	public static void main(String[] args) {
		Main so = new Main();
		System.out.println(so.swapBits(4));
	}
	public int swapBits(int n){
		return (((n&0xaaaaaaaa)>>1)|((n&0x55555555)<<1));
	}
}