二进制奇偶位置交换

import java.util.Scanner;

public class d4_10 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入一个数字:");
        int num=scanner.nextInt();

        int ret=swap(num);
        System.out.println(ret);
    }

    private static int swap(int num) {
        return (((num&0xaaaaaaaa)>>1)|((num&0x55555555)<<1));
    }
}