public class Computer
{
    public Computer (boolean debug)
    {
        _accumulator = 0;
        _debug = debug;
    }

    private int _accumulator;
    private boolean _debug;
}
import java.util.*;

public class Computer
{
    public Computer (boolean debug)
    {
        _accumulator = 0;
        _debug = debug;
    }

    public int executeUntilInfiniteLoop (Vector<OpCode> instructions)
    {
        int index = 0;
        OpCode op = instructions.elementAt(index);

        _accumulator = 0;
        
        while (!op.visited())
        {

        }

        return -1;
    }

    private int _accumulator;
    private boolean _debug;
}
Update Computer.java