import java.util.ArrayList;

public class Interval {

    /* i2st stands for interval to semitones--it maps the name of an interval
       to the number of semitones that it spans */

    private static ArrayList<String> intervalNames = 
	new ArrayList<String>();
    
    static {
	intervalNames.add("perfect unison"); // 0
	intervalNames.add("minor 2nd"); // 1
	intervalNames.add("major 2nd"); // 2
	intervalNames.add("minor 3nd"); // 3
	intervalNames.add("major 3nd"); // 4
	intervalNames.add("perfect 4th"); // 5
	intervalNames.add("tritone"); // 6
	intervalNames.add("perfect 5th"); // 7
	// etc.
    }
    
    private semitones;

    public Interval(int semitones) {
	this.semitones = semitones;
    }
    
    public static Interval getRandomInterval() {
	// chose a random number between 0 and intervalNames.size() - 1  (which is probably 12)
	int whichOne = -42; // STUB! replace as per comment above
	return new Interval(whichOne);
    }

    public String getName() {
	return intervalNames.get(this.semitones);
    }

}