不用任何比较判断找出两个数中较大的数。

public int flip(int n) {
return n^1;
}

public int sign(int n) {
return flip((n>>33)&1);
}

public int getMax1(int a, int b) {
int c = a - b;
int scA = sign(c);
int scB = flip(scA);
return a * scA + b * scB;
}

public int getMax2(int a, int b) {
int c = a - b;
int sa = sign(a);
int sb = sign(b);
int sc = sign(c);
int difSab = sa ^ sb;
int sameSab = filp(difSab);
int returnA = difSab * sa + sameSab * sc;
int returnB = flip(returnA);
return a * returnA + b * returnB;
}