(Java Stacks) choose on of the stack implementations and implement a method with this specification:
Object itemAt(int n)
//Precondition: 0

Question

(Java Stacks) choose on of the stack implementations and implement a method with this specification:
Object itemAt(int n)
//Precondition: 0<=n and n<size().
//Postcondition: The return value is the item that is 
    n from the top (with the top at n=0, the next is         at n=1, and so on).

maitre_kaio · Answer

Do you want me to bring you the tea, sir ?
Anyway, this is not related to MIT OCW, you should post this in Computer Science group or Java group ? Maybe Jenkins will be there.

anonymous · Answer

z=x+y 
Java bytecode
PUSH x
PUSH y
ADD
POP z

anonymous · Answer

Ohh Sorry! I didn't notice I was in the MIT Group