整数变换

package 整数转化;public class Transform {    public int calcCost(int A, int B) {        // write code here        int res = 0;        for (int i = 0; i < 32; i++) {            if ((A & 1) != (B & 1)) {                res++;            }            A >>= 1;            B >>= 1;        }        return res;    }    public static void main(String[] args) {        System.out.println(new Transform().calcCost(-1, 1));    }}

package 整数转化;

public class Transform {

public int calcCost(int A, int B) {    // write code here    int res = A ^ B;    int count = 0;    while (res != 0) {        if ((res & 1) == 1)            count++;        res = res & (res - 1);    }    return count;}public static void main(String[] args) {    System.out.println(new Transform().calcCost(-1, 1));}

}