枚举不能继承.

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 package com.canal.demo;

import com.google.common.collect.Lists;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class ZookeeperHello {
	public interface Operation{
		public long apply(long t1,long t2 );
	}

	public static enum BasicOperation implements Operation{
		ADD(1,"加法") {
			public long apply(long t1, long t2) {
				return t1+t2;
			}
		},
		MULTIPLY(2,"乘法") {
			public long apply(long t1, long t2) {
				return t1*t2;
			}
		};

		private int code;
		private String desc;
		BasicOperation(int code, String desc) {
			this.code = code;
			this.desc = desc;
		}

		public String getDesc() {
			return desc;
		}
	}

	public static class ComplexOperation implements Operation{
		public long apply(long t1, long t2) {
			return t1*t1+ t2*t2;
		}
	}

	public static enum NewOperation implements Operation{
		MUTLPLYANDADD(2,"先乘法后加法") {
			public long apply(long t1, long t2) {
				return t1*t2+t2;
			}
		};

		private int code;
		private String desc;
		NewOperation(int code, String desc) {
			this.code = code;
			this.desc = desc;
		}

		public String getDesc() {
			return desc;
		}
	}

	public static void main(String[] args) {
		List<Operation> operationList=new ArrayList();
		operationList.add(new ComplexOperation());
		operationList.addAll(Lists.newArrayList(BasicOperation.values()));
		operationList.addAll(Lists.newArrayList(NewOperation.values()));
		operations(operationList,2L,3L);
	}

	//使用通配符 进行类型限制
	private static void operations(Collection<? extends Operation> operations, long op1, long op2){
		for(Operation operation: operations){
			System.out.println("result is "+ operation.apply(op1,op2));
		}
	}

}