如何使用枚举避免反射

enum Operation {
    ADD {
        public int execute(int a, int b) {
            return a + b;
        }
    },
    SUBTRACT {
        public int execute(int a, int b) {
            return a - b;
        }
    },
    MULTIPLY {
        public int execute(int a, int b) {
            return a * b;
        }
    },
    DIVIDE {
        public int execute(int a, int b) {
            return a / b;
        }
    };

    public abstract int execute(int a, int b);
}

public class Main {
    public static void main(String[] args) {
        int a = 10;
        int b = 5;
        Operation operation = Operation.ADD;

        int result = operation.execute(a, b);
        System.out.println(result);
    }
}