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package javaapp;

/**
 *
 * @author pw.gr2.5
 */
public class Stopwatch {


    private long start;

    public Stopwatch() {
        start = 0;
    }

    public void start() {
        if(start == 0)
            start = System.currentTimeMillis();
    }

    // return time (in seconds) since this object was created
    public double elapsedTime() {
        if(start == 0) { return 0; } //You need to start it first

        long time = (long) ((System.currentTimeMillis() - start) / 1000.0);
        start = 0; // reset start to allow you to start it again later
        return time;

    }
}