Java 泛型求和

package com.dong;


interface dong{public Double sum();}
class Demo  implements dong{
	T[] t ;
	public Demo(T[] t) {
		this.t=t;
	}
	@Override
	public Double sum() {
		// TODO Auto-generated method stub
		Double sum=new Double(0.0);
		for(T s:t) {
			sum+=s.doublevalue();
		}
		return sum;
	}
	public static void main(String[] args) {
		Integer[] a1 = new Integer[] {1,2,3,45,6,7};
		Double[] a2=new  Double[]{1.0,2.0,3.0,45.0,6.0,7.0};
//		适配器包装数组
		Demo a11 = new Demo(a1);
		Demoa22=new Demo(a2);
		System.out.println(a11.sum());
		System.out.println(a22.sum());
	}

}