Program to explain Generic Constructor with Bounded type in Java

// Program to explain Generic Constructor with Bounded type.
class  Gen 
{
private double val;
//  Generic constructor.
<T extends Number> Gen(T arg) 
{
 val = arg.doubleValue();
}
void showValue() 
{
 System.out.println("val: " + val);
}
}
public class  GenericTest5
{
public static void main(String args[ ]) 
{
 Gen t1 = new Gen(100);
 Gen t2 = new Gen(123.5F);
 t1.showValue();
 t2.showValue();
}
}
Output:
val: 100.0
val: 123.5