Runner.java (synchronized start version)

package runners_advanced;

public class Runner implements Runnable

    {
    private int runnerID;
    private Start start;
    public static final int COUNTER = 100;

    public Runner(int id, Start s)
        {
        runnerID = id;
        start = s;
        }

    public int getRunnerID()
        {
        return runnerID;
        }

    public String toString()
        {
        return "Runner " + runnerID;
        }

    public void run()
        {
        int metresRun = 0;
        while(metresRun < COUNTER)
            {
            boolean check = start.ready(); // Checks if the current runner is the last runner
            start.setReady(this);
            try
                {
                if(start.ready())
                    {
                    if(start.ready() != check)
                        Thread.sleep((long)(Math.random() * 10)); // Makes the last runner sleep so that they don't start before the others all the time
                    metresRun++;
                    Thread.sleep((long)(Math.random() * 10));
                    System.out.println(toString() + " has run " + metresRun + " metres");
                    }
                else System.out.println(toString() + " waiting...");
                }
            catch(InterruptedException e)
                {
                e.printStackTrace();
                }
            }
        System.out.println(toString() + " has arrived!");
        }
    }