TestNanoTimer2.java

public class TestNanoTimer2 {

  /**
    *   Program:    TestNanoTimer2.java
    *   Purpose:    Time running of a for loop
    *   Creator:    Chris Clarke
    *   Created:    02.10.2015
    */

    private static final int MAX = 10000000; // ten million

    public static void main(String[] args) {

        NanoTimer2 t = new NanoTimer2();
        t.setStartTime();

        // start of test loop

        for (int i=0; i<MAX; i++) {
            double j = i * 2.12345;
        } // end for

        // end of test loop

        t.setRunningTime();
        System.out.println(t.toString());

    } // end main()

} // end class testNanoTimer2


class NanoTimer2 {

   /*
    *   Class:      NanoTimer2.java
    *   Purpose:    Get program running times
    *   Creator:    Chris Clarke
    *   Created:    03.04.2014 and 02.10.2015
    */

    private long startTime = 0, runningTime = 0;

    public void setStartTime() {
        startTime = System.nanoTime();
    }

    public void setRunningTime() {
        runningTime = System.nanoTime() - startTime;
    }

    public long getRunningTime() {
        return runningTime;
    }

    public String toString() {
        return "Running time: " + getRunningTime() + " ns";
    }

} // end class NanoTimer2