Write an LLStack class that implementsthe Stack interface given below using alinked list rather than an array (as done in class).Your LLStack class should include all themethods in the Stack interface(push(), pop(), peek(), isEmpty()) as well as atoString() method. Test this classthoroughly and make sure it works properly, because its essentialfor Part 2! ( Check the other question I posted onCramster)

public interfaceStack

{

// push an item onto the stack

void push(E element);

// pop an item from the stack (and return theitem)

E pop();

// return the item on top of the stack (withoutpopping)

E peek();

// returns whether the stack is empty

boolean isEmpty();

// returns the stack contents as astring

String toString();

}