小编mak*_*rus的帖子

如何反转最后一位int？

int a = 11;
System.out.print(a + " " + Integer.toBinaryString(a)) //11 1011

int b = invertLastBit(a);
System.out.print(b + " " + Integer.toBinaryString(b)); //10 1010

我写了这个:

static int invertLastBit(int i)
{
    String s = Integer.toBinaryString(i);
    if (s.charAt(s.length()-1) == '0'){
        s = s.substring(0,s.length() - 1);
        s = s+"1";
    }else if (s.charAt(s.length()-1) == '1') {
        s = s.substring(0, s.length() - 1);
        s = s + "0";
    }
    return Integer.parseInt(s, 2);
}

但是我该如何重写invertLastBit()呢？