Thread: How to call a static method within a static method in the same class?

Hi guys,
I'm trying to call a static method within a static method of the same class, but I can't figure out how. In the tuneAll method below, I'm trying to call tune(Instrument an Instrument). When I try to compile it by just declaring tune(), it says I need an Instrument argument, so then I put Instrument.tune() and it says tune() cannot be found. What am I doing wrong?

    /**
     * Calls the what(), adjust() and play() methods on the parameter which is an Instrument.
     * 
     * @param anInstrument an Instrument in the hierarchy
     */
    public static void tune(Instrument anInstrument) {
        anInstrument.what();
        anInstrument.adjust();
        anInstrument.play();
    }
 
    /**
     * Tunes each instrument in the ArrayList by calling the tune method.
     * 
     * @param e an ArrayList of Instruments
     */
    public static void tuneAll(java.util.ArrayList<Instrument> e) {
        for (int i=0; i<e.size(); i++) {
            Instrument.tune();
        }
    }

Well tune() takes an Instrument as an argument. So I actually should pass an Instrument argument within the parenthesis, right?. Which means I need to change the Instrument.tune() line to _______.tune(______); but I'm confused as to what.

It looks to me like you have designed this poorly, it seems to me that tune() should probably NOT be a static method of Instrument, but just a standard method. But in regards to the way you are doing it, you should call it as you were before but pass in the instrument you wish to tune. That is coming from the ArrayList you are looping through.

Chris

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