數字按位倒轉

n個數，將其中的偶數的二進制反轉
比如，輸入1 6 5
6是偶數，二進制110，翻轉後011，代表3，最終輸出1 3 5
輸入描述：
輸入包含多組測試數據
對於每一組測試數據：
N——輸入的字數
N個數：a0,a1,a2……,an-1
保證：
1<=N<=3000,0<=ai<=INT_MAX
輸出描述：
對於每個數組，輸出N個整數
輸入例子：
5
1 3 10 6 7
6
26 52 31 45 82 34
輸出例子：
1 3 5 3 7
11 11 31 45 37 17
解決方案有兩種：
1.轉化成2進制字符串然後倒轉字符數組

import java.util.Scanner;

/**
 * Created by Feng on 2016/6/21.
 */
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while(scanner.hasNext()){
            int n = scanner.nextInt();
            int src[]  = new int[n];
            for (int i = 0; i < n; i++) {
                src[i] = scanner.nextInt();
            }
            for (int i = 0; i < n; i++) {
                if((src[i]&1)==0){
                    src[i] = Integer.parseInt(reve(Integer.toBinaryString(src[i])),2);
                }
            }
            for (int i = 0; i <n ; i++) {
                System.out.print(src[i] + " ");
            }
            System.out.println();
        }
    }
    public static String reve(String s){
        char[] src = s.toCharArray();
        for (int i = 0; i <src.length/2 ; i++) {
            char temp = src[i];
            src[i] = src[src.length-i-1];
            src[src.length-i-1] = temp;
        }
        return new String(src);
    }
}

2.按位運算

import java.util.Scanner;

/**
 * Created by Feng on 2016/6/21.
 */
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while(scanner.hasNext()){
            int n = scanner.nextInt();
            int src[]  = new int[n];
            for (int i = 0; i < n; i++) {
                src[i] = scanner.nextInt();
            }
           for (int i = 0; i < n; i++) {
                if((src[i]&1)==0){
                    int temp = src[i];
                    while((temp&1)==0) temp = temp>>1;

                    src[i] = 1;
                    temp = temp>>1;
                    while(temp>0){
                        src[i] = src[i]<<1;
                        if((temp&1)==0){

                        }else{
                            src[i]+=1;
                        }
                        temp = temp>>1;
                    }
                }
            }
            for (int i = 0; i <n ; i++) {
                System.out.print(src[i] + " ");
            }
            System.out.println();
        }
    }
}