I need a basic Java program of a Stock Market Simulator

General information for the business: Exemplar Code
Kind of development: New program from scratch
Description of requirements/functionality: A basic program that simulates an investor buying and selling shares in a stock market. The investor needs tools to display his portfolio and buy and sell shares. Shares value can go up and down so an underlying simulation of the market should be implemented. A "Next Day" button is used to proceed through the simulation (i.e. using random number generation to sensibly fluctuate the value of stocks each day)

GUI Example attached!
Of course, validation measures should be included such as when trying to buy any number of shares that you can't afford, and negative purchase amounts.
BlueJ package would be appreciated.

Requirements:
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Includes screen output and keyboard input and basic classes.
There are java source files for at least three major classes in the program.
Good source comments and code indentation is expected for all implemented parts of the code
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Includes methods and variables for at least three major classes, and all constructions above.
At least 3 major methods fully implemented and working for each class
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At least three major program classes will be implemented, with methods working and well designed, and all constructions above
Use of inheritance with at least one superclass and three subclasses
Class, method and variable naming will be clear and consistent
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Polymorphism should be used in at least three subclasses, and all constructions above
At least four major program classes will be implemented, with methods working and well designed,
Comments are clear and applied to class and method level consistently
Example: As above, but the simulation is more natural, there is a running commentary of the change in value of the shares with major events reported.
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Use of ArrayLists or other classes from Java’s Collection Framework in all parts of the program, and all constructions above.
Exception handling is carried out appropriately in all parts of the program
Inheritance is correctly applied to all parts of the program.
Example: As above, but all types of accounts and functionality will now be included in the simulation. The simulation is now mostly ruled by a basic GUI.
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Includes file input and/or output, and all constructions above
The simulation (including player movement) will be displayed on the GUI
Polymorphism will be fully implemented in all parts of the program
Example: As above, with a full GUI now controlling all aspects of the simulation; data should be read from files.
Specific technologies required: BlueJ
Extra notes: