Program to explain Generic class with Bounded type in Java

// Program to explain Generic class with Bounded type.

//  The type argument for T must be either Number, or a 
//  class derived from Number.
class  Stats<T extends Number> 
{ 
T[ ] nums;
  
Stats(T[ ]  o) 
{ 
 nums = o; 
} 

double average() 
{ 
 double sum = 0.0;
 for(int i=0; i < nums.length; i++) 
  sum += nums[i].doubleValue();
 return sum / nums.length;
} 
} 

public class  GenericTest11 
{ 
public static void main(String  args[ ]) 
{ 
 Integer inums[ ] = { 1, 2, 3, 4, 5 };
 Stats<Integer> iob = new Stats<Integer>(inums);
 double v = iob.average();
 System.out.println("iob average is " + v);
 Double dnums[ ] = { 1.1, 2.2, 3.3, 4.4, 5.5 };
 Stats<Double> dob = new Stats<Double>(dnums);
 double w = dob.average();
 System.out.println("dob average is " + w);
} 
}
 
Output:
iob average is 3.0
dob average is 3.3