Using the state pattern, you have to implement an application that help track the item ordered

from online shop. The client orders an item from online shop, then item can go to post office, then

it will be delivered to the user home. Or the item after being ordered it goes to the post office,

then the user will pick it up from the post office. In both cases; either take the item from the post

office or has it delivered to the client's home represents the end of the process.

Draw the state diagram that shows all possible states and transitions $($i have done this$)$

Write code of the Ordered state?

Write the implementation of the Shoporder class; most important things are the states

declaration, the constructor, a function to return robot state

$($all the codes shall be in written in java$)$