import java.util.ArrayList;

/**
 * Classes that implement the Runnable interface must provide a no-argument run() method.
 * Think of run() as a sort of main method — it's where execution will start when
 * this object is "executed".  Since we can't pass arguments to run(), any information
 * needed by an instance of this class needs to be passed as arguments to the constructor.
 * 
 * @author richards
 */
public class Grunt implements Runnable {

    private int interval;
    private int id;
    
    private ArrayList<String> output;

    /**
     * Each grunt gets "personalized" with these argument values.
     * @param id  The id number of this specific Grunt object.
     * @param interval  Used in the run() method to figure out when to print.
     */
    public Grunt(int id, int interval, ArrayList<String> output)
    {
        this.id = id;
        this.interval = interval;
        this.output = output;
    }

    /**
     * After an initial line of ouptut, the run() method here just loops forever, 
     * printing periodically as it goes.  
     */
    public void run() {
        System.out.println("This is Grunt #"+id+" reporting for duty.");
        int val = interval;
        while(true)
        {
            val = val + interval;
            if (val == interval) {
                System.out.println("Grunt #"+id+" hit it again");
                output.add("Grunt #"+id+" hit it again");
            }
        }
    }

}