java通过接口扩展枚举

package com.hra.riskprice;

import com.hra.riskprice.SysEnum.Factor_Type;
import com.hra.riskprice.pojo.SysEnumDict;
import com.sun.corba.se.spi.orb.Operation;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import java.util.*;

@SpringBootApplication
public class RiskpriceApplication {
     interface  Operation{
    double apply(double x,double y);

}
    enum  BasicOperation implements Operation {

        PLUS("+"){
            public double apply(double x, double y) {
                return x+y;
            }
        },
        MINUS("-"){

            public double apply(double x, double y) {
                return x-y;
            }
        },
        TIMS("*"){

            public double apply(double x, double y) {
                return x*y;
            }
        },
        DIVIDE("/"){

            public double apply(double x, double y) {
                return x/y;
            }
        };
        private  final  String symbol;
        BasicOperation(String symbol){
            this.symbol=symbol;

        }

        @Override
        public String toString() {
            return symbol;
        }
    }
    public static void main(String[] args) {
        BasicOperation b;
        b=BasicOperation.PLUS;
        Integer[] ids= Integer.class.getEnumConstants();
       test(BasicOperation.class,1,3);//主要方法 下面是获取枚举集合的列举方法
        EnumSet<BasicOperation> ops= EnumSet.allOf(BasicOperation.class);//在java中为枚举专门设计 效率高 第一名
        BasicOperation[] op2s= BasicOperation.values();//效率没有EnumSet高 第二名
        BasicOperation[] op1s= BasicOperation.class.getEnumConstants(); //如果不是枚举返回空 任何类型都点的出来 注意用到了.class  第三名
    }
    private static <T extends  Enum<T> & Operation> void test(Class<T> opSet,double x,double y){

        for(Operation op:opSet.getEnumConstants()){
           System.out.println(x+" "+op +" "+ y+" ="+op.apply(x,y));

        }
    }
}