How to calculate method execution time in Java ?

0 votes
How do I get a method's execution time? Is there a Timer utility class for things like timing how long a task takes, etc?

Most of the searches on Google return results for timers that schedule threads and tasks, which is not what I want.
May 24, 2018 in Java by Daisy
• 8,050 points
100 views

1 answer to this question.

0 votes

Use the following code :

new Timer(""){{
    // code to time 
}}.timeMe();



public class Timer {

    private final String timerName;
    private long started;

    public Timer(String timerName) {
        this.timerName = timerName;
        this.started = System.currentTimeMillis();
    }

    public void timeMe() {
        System.out.println(
        String.format("Execution of '%s' takes %dms.", 
                timerName, 
                started-System.currentTimeMillis()));
    }

}
answered May 24, 2018 by Rishabh
• 3,540 points

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