写出从键盘输入x与n，用递归求x的n次方的java代码，输出不要带中文

public static double power(double x, int n) {
if (n == 0) {
return 1.0;
}
double half = power(x, n / 2);
if (n % 2 == 0) {
return half * half;
} else {
return half * half * x;
}
}

调用方法： double result = power(x, n);