Review the following

CLASS I (Partical)

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public String climateDataOut[];

try

you need to change your climaticData method to return String[] instead of void. Add return(climateDataOut); at the end of the method and then change your calling class to catch the String[].

another thing ... quick paste into eclipse and it suggests that you cast "this" with (ActionListener) and (ItemListener) .... Also I think you may have meant addItemListener on the second food.add*...

First thing I see is that you missed semicolons on the following lines:

order.addActionListener(this)
food.addActionListener(this)