Your code requires a generic class called ArrayBox to be declared:

public class ArrayBox [ 1 mark ]

The ArrayBox must have the following declarations:

public E set(int index, E e) [ 1 mark ] must throw IndexOutOfBoundsException

public boolean isEmpty() [ 1 mark ]

public boolean add( E e ) [ 1 mark ]

public E remove( int idx ) [ 1 mark ] must throw IndexOutOfBoundsException

public E get( int idx ) [ 1 mark ] must throw IndexOutOfBoundsException

public int size()