Java泛型多边界的设置方法分享

实现思路:
    只需在类型定义时，使用extends 并放入多个类型
	如:
     public static <T extends Number & Comparable<T>> T maximum(T x, T y, T z)

 
package com.java265;

public class GenericsTester {
   public static void main(String[] args) {
      System.out.printf("Max of %d, %d and %d is %d\n\n",
         8, 9, 6, maximum(8,9,6));

      System.out.printf("Max of %.1f,%.1f and %.1f is %.1f\n\n",
         6.6,8.8,7.7, maximum(6.6,8.8,7.7 ));
   }

   public static <T extends Number
      & Comparable<T>> T maximum(T x, T y, T z) {
      T max = x;      
      if(y.compareTo(max) > 0) {
         max = y;   
      }

      if(z.compareTo(max) > 0) {
         max = z;                    
      }
      return max;      
   } 

}