i need part and part 2 done

part 1 ans part 2

Create an implementation of a stack for the following interface A stack of items. */ public interface ItemStack 1 /* Push an item onto the stack @param item item to be pushed * public void pushItem( item): ** Pop an item of the stack return the popped item * @throw NoSuchElementException it stack is empty */ public E popItem(): Return the item on the top of the stack without removing it return the item on the top of the stack throw NoSuchelementException it stack is empty public E peekItem(); Test if the stack 19 empty . return true if the stack is empty, otherwise false */ public boolean 18 Empty): hip /** Clear the stack, removes all items. */ public void clear(); Part II: Write JUnit test program to thoroughly test all of the methods of your ItemStack class. Once you are confident is it working correctly. proceed to part III Part III: On Moodle is assmt4. This contains the Painter program. The task is to add undo/redo support Packer Undo/redo is generally implemented using stacks of objects that have redo and undo methods. These operations can be expressed by the following abstract data type e Task: Part 1: Create an implementation of a stack for the following interface stack of Items public interface censtock Panth an item onto the stack puram item - items to be pushed public void paahItem Item Pop an item of the stock return the popped item throw NoSuchentException if stack 19 empty puble E popitem() Return the item on the top of the state without removing it return the item on the top of the stack - throw NoSuchelementException stack in empty public peekten the states Y Potom of the return the popped item Phrow Bosch Exception stack in my puble I popie(): Return this item on the top of the stack without removing it Breturn the item on the top of the stack throw NoSuchelement. Exception if atack in empty * public peelten() Test if the stack is empty return true if the stack 10 empty, otherwise false public boolean impty(); Clear the track, Lemove all Items */ public void lear(); Part II: Write JUnit test program to thoroughly test all of the methods of your ItemStack class. Once you are confident is it working correctly, proceed to part III hp