Question

LinkedMaxHeap myHeap = new LinkedMaxHeap();
is giving those yellw underlined warnings why?

Answer 1

if this is Java, I got no clue :D But try to look it, not sure u must be doing something wrong so the IDE is telling ya :p

Answer 2

this is java
my class is
public class LinkedMaxHeap<T extends Comparable<T>>
extends LinkedBinaryTree<T> implements MaxHeap<T>
{....
}

Answer 3

ohh I figure it out it was Java...and yo are trying to make a new instance of your class, in this case is a new object of the type pf your class, right?

Answer 4

yes

Answer 5

umm, well does it compile, or it doesn't cuz sometime with warnigs, the program can still run... since is not an error...

Answer 6

it is runnig well and giving me desired output

Answer 7

but, i think i need to say something inthe <> next to LinkedMaxHeap

Answer 8

what does the warnings display?

Answer 9

References to generic type LinkedMaxHeap<T> should be parameterized

Answer 10

but the class says, LinkedMaxHeap<T extends Comparable<T>>
extends LinkedBinaryTree<T> implements MaxHeap<T>

Answer 11

well my best guess is that the compaler is telling you, it expects you to specify the type of Class object being passed to the method. You could define it as the type as Object if you are not sure...

The T there must be a type you choose, wheter is a user defined one (class, object, list , etc) or a primitive type (int, float, double, long double, etc)..

That's what is my guess from I had seen...

Answer 12

by user defined, I meant the one of those type a programmer defines, like those in the ( ) I specify avobe...

Answer 13

Since you are trying to use Generic Types, you could look at this Tutorial I saw about it:

Generic Types Tutorial:
http://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf

Answer 14

thanks, i will.

Answer 15

No problem :)

Answer 16

You have 'extends' twice. You cannot extend multiple classes, you can only extend 1 but you can implement as many as you want.

Answer 17

Just saw this. You're getting the underlines because you are not specifying a type for your class, as fr33 noted.

LinkedMaxHeap myHeap = new LinkedMaxHeap();
should be:
LinkedMaxHeap<SomeType> myHeap = new LinkedMaxHeap<SomeType>();

SomeType is whatever type of objects you want to go into the heap. If you don't specify a type, you're basically losing any advantage the compiler can provide in terms of compile-time type checking. If you tell the heap what kind of objects are going into it, the compiler can verify that everything going into and out of the heap is of the appropriate type. If you do not, you put yourself at risk of run-time failure if you use the heap without caution.

I think there are also some performance benefits to specifying the type, but I could be imagining that from somewhere.