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I have no idea how to start the interpreter for this java project. I need some hint on the LET statement in order to write other code such as ADD, MINUS, GOTO...etc Thanks [CODE]public abstract class Statement { // execute() takes a ProgramState and executes this statement, by making // … 
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In java code, when to expect to throw an exception with a throw statement and when to catch an exception with a try/catch block? Moreover, how to distinguish between a situation in which an exception should be caught by a method or throw to its caller.
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For the parser class, I need to use parseProgram() to take a filename as a parameter, opens and read the contents of the file, and returns an ArrayList of Statement objects. Since I am new to Java, I do not know where to start from. I also like to know …
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Below is my LinkedList class and also a private Node class inside it, I also write a unit test method to test if every method in LinkedList work, but the hasNext() and Next() ultimately failed. Please let me know what is wrong with the next() and hasNext() method. Here is … 
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