public class MathUtil { public int f(int a, int b) { if (b == 0) { return a; } else { return f(b, a % b); } }}public class LCMUtil extends MathUtil { @Override public int f(int a, int b) { int m = super.f(a, b); return (a * b) / m; }}public class Main { public static void main(String[] args) { MathUtil mathUtil = new MathUtil(); int gcd = mathUtil.f(12, 18); System.out.println("12和18的最大公约数是：" + gcd); LCMUtil lcmUtil = new LCMUtil(); int lcm = lcmUtil.f(12, 18); System.out.println("12和18的最小公倍数是：" + lcm); }}完整java语句

完整的 Java 语句如下：

public class MathUtil {
    public int f(int a, int b) {
        if (b == 0) {
            return a;
        } else {
            return f(b, a % b);
        }
    }
}

public class LCMUtil extends MathUtil {
    @Override
    public int f(int a, int b) {
        int m = super.f(a, b);
        return (a * b) / m;
    }
}

public class Main {
    public static void main(String[] args) {
        MathUtil mathUtil = new MathUtil();
        int gcd = mathUtil.f(12, 18);
        System.out.println("12和18的最大公约数是：" + gcd);
        LCMUtil lcmUtil = new LCMUtil();
        int lcm = lcmUtil.f(12, 18);
        System.out.println("12和18的最小公倍数是：" + lcm);
    }
}