package javathreads.examples.ch09;

import java.util.*;
import java.text.*;

public class Task implements Runnable {
    long n;
    String id;

    private long fib(long n) {
        if (n == 0)
            return 0L;
        if (n == 1)
            return 1L;
        return fib(n - 1) + fib(n - 2);
    }

    public Task(long n, String id) {
        this.n = n;
        this.id = id;
    }

    public void run() {
        Date d = new Date();
        DateFormat df = new SimpleDateFormat("HH:mm:ss:SSS");
        long startTime = System.currentTimeMillis();
        d.setTime(startTime);
        System.out.println("Starting task " + id + " at " + df.format(d));
        fib(n);
        long endTime = System.currentTimeMillis();
        d.setTime(endTime);
        System.out.println("Ending task " + id + " at " + df.format(d) + " after " + (endTime - startTime) + " milliseconds");
    }
}