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+// increases or decreases a single global value called the accumulator by the value given in the argument.%0A%0Apublic class Accumlator extends OpCode%0A%7B%0A    public Accumulator (int amount)%0A    %7B%0A        super(OpCode.ACCUMULATOR);%0A%0A        _amount = amount;%0A    %7D%0A%0A    private int _amount;%0A%7D

Create Accumulator.java