Why Use Extends Keyword Instead Of Implements In Generics

Why java uses the keyword extends when setting the bound of a type parameter(Generic) to an interface. I think using the keyword implements is more intuitive.

public static <T extends Comparable<T>>

why use extends? and not implements.

int countGreaterThan(T[] anArray, T elem) {
int count = 0;
for (T e : anArray)
if (e.compareTo(elem) > 0)
++count;
return count;
}

I know if I want to set multiple bounds I will use extends keyword, and I will concatenate the bounds using & operator.

Is this a design decision to always use extends keyword to set bounds?