LogicGates/eu.heili/ExorGate.java

public class ExorGate extends LogicGate {
    public ExorGate(final int inputnr) {
        super(inputnr);
        if (inputnr > 2)
            throw (new TooManyInputsException());
    }

    public ExorGate(final DigitalInput... inputvals) {
        super(inputvals);
        if (inputvals.length > 2)
            throw (new TooManyInputsException());
    }

    @Override
    public boolean getOutput() {
        boolean first = getInput(0).getValue();
        for (int i = 1; i < getInputNumber(); i++) {
            if (getInput(i).getValue() != first)
                return true; // if there is one change return true
            first = getInput(i).getValue();
        }
        return false; // all values are the same...
    }
}